Home / 1,145.04-1,580.80-725.46

Finding the Fourth Proportional to 1,145.04, 1,580.80 and 725.46

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Solution

The fourth proportional to 1,145.04, 1,580.80 and 725.46 is: 1,001.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.04 : 1,580.80 = 725.46 : x
  2. Step 2: Convert to fraction form
    1,145.04/1,580.80 = 725.46/x
  3. Step 3: Cross multiply
    1,145.04x = 1,580.80 × 725.46
  4. Step 4: Simplify right side
    1,145.04x = 1,146,807.17
  5. Step 5: Solve for x
    x = 1,146,807.17/1,145.04
  6. Step 6: Final answer
    x = 1,001.54

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1.5x scale

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.