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Finding the Fourth Proportional to 602,398.80, 902,561.40 and 391,928.40

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Solution

The fourth proportional to 602,398.80, 902,561.40 and 391,928.40 is: 587,218.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    602,398.80 : 902,561.40 = 391,928.40 : x
  2. Step 2: Convert to fraction form
    602,398.80/902,561.40 = 391,928.40/x
  3. Step 3: Cross multiply
    602,398.80x = 902,561.40 × 391,928.40
  4. Step 4: Simplify right side
    602,398.80x = 353,739,445,403.76
  5. Step 5: Solve for x
    x = 353,739,445,403.76/602,398.80
  6. Step 6: Final answer
    x = 587,218.04

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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.