Home / 687,302.20-1,031,390.70-402,992.20

Finding the Fourth Proportional to 687,302.20, 1,031,390.70 and 402,992.20

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Solution

The fourth proportional to 687,302.20, 1,031,390.70 and 402,992.20 is: 604,744.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,302.20 : 1,031,390.70 = 402,992.20 : x
  2. Step 2: Convert to fraction form
    687,302.20/1,031,390.70 = 402,992.20/x
  3. Step 3: Cross multiply
    687,302.20x = 1,031,390.70 × 402,992.20
  4. Step 4: Simplify right side
    687,302.20x = 415,642,407,252.54
  5. Step 5: Solve for x
    x = 415,642,407,252.54/687,302.20
  6. Step 6: Final answer
    x = 604,744.76

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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.