Home / 761,715.88-1,142,734.02-288,390.76

Finding the Fourth Proportional to 761,715.88, 1,142,734.02 and 288,390.76

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Solution

The fourth proportional to 761,715.88, 1,142,734.02 and 288,390.76 is: 432,646.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,715.88 : 1,142,734.02 = 288,390.76 : x
  2. Step 2: Convert to fraction form
    761,715.88/1,142,734.02 = 288,390.76/x
  3. Step 3: Cross multiply
    761,715.88x = 1,142,734.02 × 288,390.76
  4. Step 4: Simplify right side
    761,715.88x = 329,553,932,505.66
  5. Step 5: Solve for x
    x = 329,553,932,505.66/761,715.88
  6. Step 6: Final answer
    x = 432,646.79

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1.5x scale

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.