Home / 687,788.42-1,031,887.65-328,229.21

Finding the Fourth Proportional to 687,788.42, 1,031,887.65 and 328,229.21

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Solution

The fourth proportional to 687,788.42, 1,031,887.65 and 328,229.21 is: 492,441.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,788.42 : 1,031,887.65 = 328,229.21 : x
  2. Step 2: Convert to fraction form
    687,788.42/1,031,887.65 = 328,229.21/x
  3. Step 3: Cross multiply
    687,788.42x = 1,031,887.65 × 328,229.21
  4. Step 4: Simplify right side
    687,788.42x = 338,695,671,978.84
  5. Step 5: Solve for x
    x = 338,695,671,978.84/687,788.42
  6. Step 6: Final answer
    x = 492,441.66

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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.