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Finding the Fourth Proportional to 1,020.02, 1,407.52 and 577.90

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Solution

The fourth proportional to 1,020.02, 1,407.52 and 577.90 is: 797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.02 : 1,407.52 = 577.90 : x
  2. Step 2: Convert to fraction form
    1,020.02/1,407.52 = 577.90/x
  3. Step 3: Cross multiply
    1,020.02x = 1,407.52 × 577.90
  4. Step 4: Simplify right side
    1,020.02x = 813,405.81
  5. Step 5: Solve for x
    x = 813,405.81/1,020.02
  6. Step 6: Final answer
    x = 797.44

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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.