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Finding the Fourth Proportional to 657,489.87, 986,262.89 and 258,217.18

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Solution

The fourth proportional to 657,489.87, 986,262.89 and 258,217.18 is: 387,336.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,489.87 : 986,262.89 = 258,217.18 : x
  2. Step 2: Convert to fraction form
    657,489.87/986,262.89 = 258,217.18/x
  3. Step 3: Cross multiply
    657,489.87x = 986,262.89 × 258,217.18
  4. Step 4: Simplify right side
    657,489.87x = 254,670,018,437.71
  5. Step 5: Solve for x
    x = 254,670,018,437.71/657,489.87
  6. Step 6: Final answer
    x = 387,336.79

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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.