Home / 1,125.02-1,686.33-431.46

Finding the Fourth Proportional to 1,125.02, 1,686.33 and 431.46

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Solution

The fourth proportional to 1,125.02, 1,686.33 and 431.46 is: 646.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.02 : 1,686.33 = 431.46 : x
  2. Step 2: Convert to fraction form
    1,125.02/1,686.33 = 431.46/x
  3. Step 3: Cross multiply
    1,125.02x = 1,686.33 × 431.46
  4. Step 4: Simplify right side
    1,125.02x = 727,583.94
  5. Step 5: Solve for x
    x = 727,583.94/1,125.02
  6. Step 6: Final answer
    x = 646.73

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Double scale
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1.5x scale

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.