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Finding the Fourth Proportional to 438,428.60, 657,642.90 and 367,569.80

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Solution

The fourth proportional to 438,428.60, 657,642.90 and 367,569.80 is: 551,354.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,428.60 : 657,642.90 = 367,569.80 : x
  2. Step 2: Convert to fraction form
    438,428.60/657,642.90 = 367,569.80/x
  3. Step 3: Cross multiply
    438,428.60x = 657,642.90 × 367,569.80
  4. Step 4: Simplify right side
    438,428.60x = 241,729,669,224.42
  5. Step 5: Solve for x
    x = 241,729,669,224.42/438,428.60
  6. Step 6: Final answer
    x = 551,354.70

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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.