Home / 687,712.60-1,031,568.90-288,220.60

Finding the Fourth Proportional to 687,712.60, 1,031,568.90 and 288,220.60

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Solution

The fourth proportional to 687,712.60, 1,031,568.90 and 288,220.60 is: 432,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,712.60 : 1,031,568.90 = 288,220.60 : x
  2. Step 2: Convert to fraction form
    687,712.60/1,031,568.90 = 288,220.60/x
  3. Step 3: Cross multiply
    687,712.60x = 1,031,568.90 × 288,220.60
  4. Step 4: Simplify right side
    687,712.60x = 297,319,407,299.34
  5. Step 5: Solve for x
    x = 297,319,407,299.34/687,712.60
  6. Step 6: Final answer
    x = 432,330.90

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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.