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Finding the Fourth Proportional to 783, 1,080.95 and 534.67

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Solution

The fourth proportional to 783, 1,080.95 and 534.67 is: 738.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    783 : 1,080.95 = 534.67 : x
  2. Step 2: Convert to fraction form
    783/1,080.95 = 534.67/x
  3. Step 3: Cross multiply
    783x = 1,080.95 × 534.67
  4. Step 4: Simplify right side
    783x = 577,946.16
  5. Step 5: Solve for x
    x = 577,946.16/783
  6. Step 6: Final answer
    x = 738.12

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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.