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Finding the Fourth Proportional to 1,075.60, 1,612.92 and 459.28

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Solution

The fourth proportional to 1,075.60, 1,612.92 and 459.28 is: 688.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.60 : 1,612.92 = 459.28 : x
  2. Step 2: Convert to fraction form
    1,075.60/1,612.92 = 459.28/x
  3. Step 3: Cross multiply
    1,075.60x = 1,612.92 × 459.28
  4. Step 4: Simplify right side
    1,075.60x = 740,781.90
  5. Step 5: Solve for x
    x = 740,781.90/1,075.60
  6. Step 6: Final answer
    x = 688.72

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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.