Home / 687,419.60-1,031,275.20-207,664.70

Finding the Fourth Proportional to 687,419.60, 1,031,275.20 and 207,664.70

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Solution

The fourth proportional to 687,419.60, 1,031,275.20 and 207,664.70 is: 311,541.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,419.60 : 1,031,275.20 = 207,664.70 : x
  2. Step 2: Convert to fraction form
    687,419.60/1,031,275.20 = 207,664.70/x
  3. Step 3: Cross multiply
    687,419.60x = 1,031,275.20 × 207,664.70
  4. Step 4: Simplify right side
    687,419.60x = 214,159,455,025.44
  5. Step 5: Solve for x
    x = 214,159,455,025.44/687,419.60
  6. Step 6: Final answer
    x = 311,541.10

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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.