Home / 687,807.80-1,031,711.70-448,663.40

Finding the Fourth Proportional to 687,807.80, 1,031,711.70 and 448,663.40

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Solution

The fourth proportional to 687,807.80, 1,031,711.70 and 448,663.40 is: 672,995.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,807.80 : 1,031,711.70 = 448,663.40 : x
  2. Step 2: Convert to fraction form
    687,807.80/1,031,711.70 = 448,663.40/x
  3. Step 3: Cross multiply
    687,807.80x = 1,031,711.70 × 448,663.40
  4. Step 4: Simplify right side
    687,807.80x = 462,891,279,141.78
  5. Step 5: Solve for x
    x = 462,891,279,141.78/687,807.80
  6. Step 6: Final answer
    x = 672,995.10

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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.