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Finding the Fourth Proportional to 716,274.95, 988,443.32 and 393,977.97

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Solution

The fourth proportional to 716,274.95, 988,443.32 and 393,977.97 is: 543,680.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,274.95 : 988,443.32 = 393,977.97 : x
  2. Step 2: Convert to fraction form
    716,274.95/988,443.32 = 393,977.97/x
  3. Step 3: Cross multiply
    716,274.95x = 988,443.32 × 393,977.97
  4. Step 4: Simplify right side
    716,274.95x = 389,424,890,703.77
  5. Step 5: Solve for x
    x = 389,424,890,703.77/716,274.95
  6. Step 6: Final answer
    x = 543,680.74

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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.