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Finding the Fourth Proportional to 687,798.20, 1,031,697.30 and 687,798.20

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Solution

The fourth proportional to 687,798.20, 1,031,697.30 and 687,798.20 is: 1,031,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,798.20 : 1,031,697.30 = 687,798.20 : x
  2. Step 2: Convert to fraction form
    687,798.20/1,031,697.30 = 687,798.20/x
  3. Step 3: Cross multiply
    687,798.20x = 1,031,697.30 × 687,798.20
  4. Step 4: Simplify right side
    687,798.20x = 709,599,545,884.86
  5. Step 5: Solve for x
    x = 709,599,545,884.86/687,798.20
  6. Step 6: Final answer
    x = 1,031,697.30

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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.