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Finding the Fourth Proportional to 1,689.71, 2,534.65 and 535.55

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Solution

The fourth proportional to 1,689.71, 2,534.65 and 535.55 is: 803.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.71 : 2,534.65 = 535.55 : x
  2. Step 2: Convert to fraction form
    1,689.71/2,534.65 = 535.55/x
  3. Step 3: Cross multiply
    1,689.71x = 2,534.65 × 535.55
  4. Step 4: Simplify right side
    1,689.71x = 1,357,417.80
  5. Step 5: Solve for x
    x = 1,357,417.80/1,689.71
  6. Step 6: Final answer
    x = 803.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.