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Finding the Fourth Proportional to 663,323.40, 994,985.10 and 309,029.40

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Solution

The fourth proportional to 663,323.40, 994,985.10 and 309,029.40 is: 463,544.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,323.40 : 994,985.10 = 309,029.40 : x
  2. Step 2: Convert to fraction form
    663,323.40/994,985.10 = 309,029.40/x
  3. Step 3: Cross multiply
    663,323.40x = 994,985.10 × 309,029.40
  4. Step 4: Simplify right side
    663,323.40x = 307,479,648,461.94
  5. Step 5: Solve for x
    x = 307,479,648,461.94/663,323.40
  6. Step 6: Final answer
    x = 463,544.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.