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Finding the Fourth Proportional to 916.93, 1,264.95 and 543.92

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Solution

The fourth proportional to 916.93, 1,264.95 and 543.92 is: 750.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.93 : 1,264.95 = 543.92 : x
  2. Step 2: Convert to fraction form
    916.93/1,264.95 = 543.92/x
  3. Step 3: Cross multiply
    916.93x = 1,264.95 × 543.92
  4. Step 4: Simplify right side
    916.93x = 688,034.77
  5. Step 5: Solve for x
    x = 688,034.77/916.93
  6. Step 6: Final answer
    x = 750.37

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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.