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Finding the Fourth Proportional to 518,355.48, 715,333.88 and 288,927.31

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Solution

The fourth proportional to 518,355.48, 715,333.88 and 288,927.31 is: 398,721.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,355.48 : 715,333.88 = 288,927.31 : x
  2. Step 2: Convert to fraction form
    518,355.48/715,333.88 = 288,927.31/x
  3. Step 3: Cross multiply
    518,355.48x = 715,333.88 × 288,927.31
  4. Step 4: Simplify right side
    518,355.48x = 206,679,493,700.26
  5. Step 5: Solve for x
    x = 206,679,493,700.26/518,355.48
  6. Step 6: Final answer
    x = 398,721.54

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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.