Home / 687,680.10-1,031,520.15-288,188.10

Finding the Fourth Proportional to 687,680.10, 1,031,520.15 and 288,188.10

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Solution

The fourth proportional to 687,680.10, 1,031,520.15 and 288,188.10 is: 432,282.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,680.10 : 1,031,520.15 = 288,188.10 : x
  2. Step 2: Convert to fraction form
    687,680.10/1,031,520.15 = 288,188.10/x
  3. Step 3: Cross multiply
    687,680.10x = 1,031,520.15 × 288,188.10
  4. Step 4: Simplify right side
    687,680.10x = 297,271,832,140.22
  5. Step 5: Solve for x
    x = 297,271,832,140.22/687,680.10
  6. Step 6: Final answer
    x = 432,282.15

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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.