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Finding the Fourth Proportional to 1,145.68, 1,580.46 and 752.60

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Solution

The fourth proportional to 1,145.68, 1,580.46 and 752.60 is: 1,038.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.68 : 1,580.46 = 752.60 : x
  2. Step 2: Convert to fraction form
    1,145.68/1,580.46 = 752.60/x
  3. Step 3: Cross multiply
    1,145.68x = 1,580.46 × 752.60
  4. Step 4: Simplify right side
    1,145.68x = 1,189,454.20
  5. Step 5: Solve for x
    x = 1,189,454.20/1,145.68
  6. Step 6: Final answer
    x = 1,038.21

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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.