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Finding the Fourth Proportional to 521,790.90, 781,779.15 and 240,731.70

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Solution

The fourth proportional to 521,790.90, 781,779.15 and 240,731.70 is: 360,679.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,790.90 : 781,779.15 = 240,731.70 : x
  2. Step 2: Convert to fraction form
    521,790.90/781,779.15 = 240,731.70/x
  3. Step 3: Cross multiply
    521,790.90x = 781,779.15 × 240,731.70
  4. Step 4: Simplify right side
    521,790.90x = 188,199,023,804.06
  5. Step 5: Solve for x
    x = 188,199,023,804.06/521,790.90
  6. Step 6: Final answer
    x = 360,679.01

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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.