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Finding the Fourth Proportional to 418,639.20, 577,737.36 and 239,825.76

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Solution

The fourth proportional to 418,639.20, 577,737.36 and 239,825.76 is: 330,968.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,639.20 : 577,737.36 = 239,825.76 : x
  2. Step 2: Convert to fraction form
    418,639.20/577,737.36 = 239,825.76/x
  3. Step 3: Cross multiply
    418,639.20x = 577,737.36 × 239,825.76
  4. Step 4: Simplify right side
    418,639.20x = 138,556,301,442.39
  5. Step 5: Solve for x
    x = 138,556,301,442.39/418,639.20
  6. Step 6: Final answer
    x = 330,968.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.