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Finding the Fourth Proportional to 518,424.98, 715,355.86 and 288,955.04

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Solution

The fourth proportional to 518,424.98, 715,355.86 and 288,955.04 is: 398,718.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,424.98 : 715,355.86 = 288,955.04 : x
  2. Step 2: Convert to fraction form
    518,424.98/715,355.86 = 288,955.04/x
  3. Step 3: Cross multiply
    518,424.98x = 715,355.86 × 288,955.04
  4. Step 4: Simplify right side
    518,424.98x = 206,705,676,841.37
  5. Step 5: Solve for x
    x = 206,705,676,841.37/518,424.98
  6. Step 6: Final answer
    x = 398,718.59

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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.