Home / 1,056.16-1,587.12-729.28

Finding the Fourth Proportional to 1,056.16, 1,587.12 and 729.28

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Solution

The fourth proportional to 1,056.16, 1,587.12 and 729.28 is: 1,095.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.16 : 1,587.12 = 729.28 : x
  2. Step 2: Convert to fraction form
    1,056.16/1,587.12 = 729.28/x
  3. Step 3: Cross multiply
    1,056.16x = 1,587.12 × 729.28
  4. Step 4: Simplify right side
    1,056.16x = 1,157,454.87
  5. Step 5: Solve for x
    x = 1,157,454.87/1,056.16
  6. Step 6: Final answer
    x = 1,095.91

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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.