Home / 718,267.28-991,178.50-391,573.22

Finding the Fourth Proportional to 718,267.28, 991,178.50 and 391,573.22

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Solution

The fourth proportional to 718,267.28, 991,178.50 and 391,573.22 is: 540,354.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,267.28 : 991,178.50 = 391,573.22 : x
  2. Step 2: Convert to fraction form
    718,267.28/991,178.50 = 391,573.22/x
  3. Step 3: Cross multiply
    718,267.28x = 991,178.50 × 391,573.22
  4. Step 4: Simplify right side
    718,267.28x = 388,118,956,839.77
  5. Step 5: Solve for x
    x = 388,118,956,839.77/718,267.28
  6. Step 6: Final answer
    x = 540,354.50

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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.