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Finding the Fourth Proportional to 718,463.16, 991,485.90 and 396,184.82

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Solution

The fourth proportional to 718,463.16, 991,485.90 and 396,184.82 is: 546,738.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,463.16 : 991,485.90 = 396,184.82 : x
  2. Step 2: Convert to fraction form
    718,463.16/991,485.90 = 396,184.82/x
  3. Step 3: Cross multiply
    718,463.16x = 991,485.90 × 396,184.82
  4. Step 4: Simplify right side
    718,463.16x = 392,811,657,866.61
  5. Step 5: Solve for x
    x = 392,811,657,866.61/718,463.16
  6. Step 6: Final answer
    x = 546,738.76

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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.