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Finding the Fourth Proportional to 577,387.20, 864,007.20 and 390,763.20

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Solution

The fourth proportional to 577,387.20, 864,007.20 and 390,763.20 is: 584,741.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,387.20 : 864,007.20 = 390,763.20 : x
  2. Step 2: Convert to fraction form
    577,387.20/864,007.20 = 390,763.20/x
  3. Step 3: Cross multiply
    577,387.20x = 864,007.20 × 390,763.20
  4. Step 4: Simplify right side
    577,387.20x = 337,622,218,295.04
  5. Step 5: Solve for x
    x = 337,622,218,295.04/577,387.20
  6. Step 6: Final answer
    x = 584,741.43

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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.