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Finding the Fourth Proportional to 415,941.60, 623,912.40 and 317,637.60

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Solution

The fourth proportional to 415,941.60, 623,912.40 and 317,637.60 is: 476,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,941.60 : 623,912.40 = 317,637.60 : x
  2. Step 2: Convert to fraction form
    415,941.60/623,912.40 = 317,637.60/x
  3. Step 3: Cross multiply
    415,941.60x = 623,912.40 × 317,637.60
  4. Step 4: Simplify right side
    415,941.60x = 198,178,037,346.24
  5. Step 5: Solve for x
    x = 198,178,037,346.24/415,941.60
  6. Step 6: Final answer
    x = 476,456.40

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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.