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Finding the Fourth Proportional to 657,790.68, 986,987.34 and 357,821.76

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Solution

The fourth proportional to 657,790.68, 986,987.34 and 357,821.76 is: 536,896.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,790.68 : 986,987.34 = 357,821.76 : x
  2. Step 2: Convert to fraction form
    657,790.68/986,987.34 = 357,821.76/x
  3. Step 3: Cross multiply
    657,790.68x = 986,987.34 × 357,821.76
  4. Step 4: Simplify right side
    657,790.68x = 353,165,547,096.52
  5. Step 5: Solve for x
    x = 353,165,547,096.52/657,790.68
  6. Step 6: Final answer
    x = 536,896.55

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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.