Home / 661,512.90-991,020.68-390,833.36

Finding the Fourth Proportional to 661,512.90, 991,020.68 and 390,833.36

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Solution

The fourth proportional to 661,512.90, 991,020.68 and 390,833.36 is: 585,512.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,512.90 : 991,020.68 = 390,833.36 : x
  2. Step 2: Convert to fraction form
    661,512.90/991,020.68 = 390,833.36/x
  3. Step 3: Cross multiply
    661,512.90x = 991,020.68 × 390,833.36
  4. Step 4: Simplify right side
    661,512.90x = 387,323,942,193.89
  5. Step 5: Solve for x
    x = 387,323,942,193.89/661,512.90
  6. Step 6: Final answer
    x = 585,512.30

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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.