Home / 718,491.61-991,542.35-391,822.49

Finding the Fourth Proportional to 718,491.61, 991,542.35 and 391,822.49

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Solution

The fourth proportional to 718,491.61, 991,542.35 and 391,822.49 is: 540,728.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,491.61 : 991,542.35 = 391,822.49 : x
  2. Step 2: Convert to fraction form
    718,491.61/991,542.35 = 391,822.49/x
  3. Step 3: Cross multiply
    718,491.61x = 991,542.35 × 391,822.49
  4. Step 4: Simplify right side
    718,491.61x = 388,508,592,517.45
  5. Step 5: Solve for x
    x = 388,508,592,517.45/718,491.61
  6. Step 6: Final answer
    x = 540,728.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.