Home / 1,125.02-1,551.25-947.72

Finding the Fourth Proportional to 1,125.02, 1,551.25 and 947.72

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Solution

The fourth proportional to 1,125.02, 1,551.25 and 947.72 is: 1,306.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.02 : 1,551.25 = 947.72 : x
  2. Step 2: Convert to fraction form
    1,125.02/1,551.25 = 947.72/x
  3. Step 3: Cross multiply
    1,125.02x = 1,551.25 × 947.72
  4. Step 4: Simplify right side
    1,125.02x = 1,470,145.91
  5. Step 5: Solve for x
    x = 1,470,145.91/1,125.02
  6. Step 6: Final answer
    x = 1,306.77

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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.