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Finding the Fourth Proportional to 668,893.20, 1,003,339.80 and 313,943.10

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Solution

The fourth proportional to 668,893.20, 1,003,339.80 and 313,943.10 is: 470,914.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,893.20 : 1,003,339.80 = 313,943.10 : x
  2. Step 2: Convert to fraction form
    668,893.20/1,003,339.80 = 313,943.10/x
  3. Step 3: Cross multiply
    668,893.20x = 1,003,339.80 × 313,943.10
  4. Step 4: Simplify right side
    668,893.20x = 314,991,607,165.38
  5. Step 5: Solve for x
    x = 314,991,607,165.38/668,893.20
  6. Step 6: Final answer
    x = 470,914.65

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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.