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Finding the Fourth Proportional to 716,275.95, 988,444.69 and 393,978.97

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Solution

The fourth proportional to 716,275.95, 988,444.69 and 393,978.97 is: 543,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,275.95 : 988,444.69 = 393,978.97 : x
  2. Step 2: Convert to fraction form
    716,275.95/988,444.69 = 393,978.97/x
  3. Step 3: Cross multiply
    716,275.95x = 988,444.69 × 393,978.97
  4. Step 4: Simplify right side
    716,275.95x = 389,426,420,868.17
  5. Step 5: Solve for x
    x = 389,426,420,868.17/716,275.95
  6. Step 6: Final answer
    x = 543,682.11

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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.