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Finding the Fourth Proportional to 1,528.89, 2,293.38 and 870.81

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Solution

The fourth proportional to 1,528.89, 2,293.38 and 870.81 is: 1,306.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.89 : 2,293.38 = 870.81 : x
  2. Step 2: Convert to fraction form
    1,528.89/2,293.38 = 870.81/x
  3. Step 3: Cross multiply
    1,528.89x = 2,293.38 × 870.81
  4. Step 4: Simplify right side
    1,528.89x = 1,997,098.24
  5. Step 5: Solve for x
    x = 1,997,098.24/1,528.89
  6. Step 6: Final answer
    x = 1,306.24

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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.