Home / 687,760.60-1,031,640.90-392,848.60

Finding the Fourth Proportional to 687,760.60, 1,031,640.90 and 392,848.60

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Solution

The fourth proportional to 687,760.60, 1,031,640.90 and 392,848.60 is: 589,272.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,760.60 : 1,031,640.90 = 392,848.60 : x
  2. Step 2: Convert to fraction form
    687,760.60/1,031,640.90 = 392,848.60/x
  3. Step 3: Cross multiply
    687,760.60x = 1,031,640.90 × 392,848.60
  4. Step 4: Simplify right side
    687,760.60x = 405,278,683,267.74
  5. Step 5: Solve for x
    x = 405,278,683,267.74/687,760.60
  6. Step 6: Final answer
    x = 589,272.90

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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.