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Finding the Fourth Proportional to 496,638.60, 744,957.90 and 390,350.40

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Solution

The fourth proportional to 496,638.60, 744,957.90 and 390,350.40 is: 585,525.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,638.60 : 744,957.90 = 390,350.40 : x
  2. Step 2: Convert to fraction form
    496,638.60/744,957.90 = 390,350.40/x
  3. Step 3: Cross multiply
    496,638.60x = 744,957.90 × 390,350.40
  4. Step 4: Simplify right side
    496,638.60x = 290,794,614,248.16
  5. Step 5: Solve for x
    x = 290,794,614,248.16/496,638.60
  6. Step 6: Final answer
    x = 585,525.60

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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.