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Finding the Fourth Proportional to 455,547.40, 683,321.10 and 449,326.60

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Solution

The fourth proportional to 455,547.40, 683,321.10 and 449,326.60 is: 673,989.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,547.40 : 683,321.10 = 449,326.60 : x
  2. Step 2: Convert to fraction form
    455,547.40/683,321.10 = 449,326.60/x
  3. Step 3: Cross multiply
    455,547.40x = 683,321.10 × 449,326.60
  4. Step 4: Simplify right side
    455,547.40x = 307,034,346,571.26
  5. Step 5: Solve for x
    x = 307,034,346,571.26/455,547.40
  6. Step 6: Final answer
    x = 673,989.90

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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.