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Finding the Fourth Proportional to 402,938.20, 604,872.90 and 216,314.20

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Solution

The fourth proportional to 402,938.20, 604,872.90 and 216,314.20 is: 324,721.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,938.20 : 604,872.90 = 216,314.20 : x
  2. Step 2: Convert to fraction form
    402,938.20/604,872.90 = 216,314.20/x
  3. Step 3: Cross multiply
    402,938.20x = 604,872.90 × 216,314.20
  4. Step 4: Simplify right side
    402,938.20x = 130,842,597,465.18
  5. Step 5: Solve for x
    x = 130,842,597,465.18/402,938.20
  6. Step 6: Final answer
    x = 324,721.25

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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.