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Finding the Fourth Proportional to 386,463.60, 579,695.40 and 342,140.40

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Solution

The fourth proportional to 386,463.60, 579,695.40 and 342,140.40 is: 513,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,463.60 : 579,695.40 = 342,140.40 : x
  2. Step 2: Convert to fraction form
    386,463.60/579,695.40 = 342,140.40/x
  3. Step 3: Cross multiply
    386,463.60x = 579,695.40 × 342,140.40
  4. Step 4: Simplify right side
    386,463.60x = 198,337,216,034.16
  5. Step 5: Solve for x
    x = 198,337,216,034.16/386,463.60
  6. Step 6: Final answer
    x = 513,210.60

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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.