Home / 1,487.57-2,052.68-928.40

Finding the Fourth Proportional to 1,487.57, 2,052.68 and 928.40

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Solution

The fourth proportional to 1,487.57, 2,052.68 and 928.40 is: 1,281.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.57 : 2,052.68 = 928.40 : x
  2. Step 2: Convert to fraction form
    1,487.57/2,052.68 = 928.40/x
  3. Step 3: Cross multiply
    1,487.57x = 2,052.68 × 928.40
  4. Step 4: Simplify right side
    1,487.57x = 1,905,693.21
  5. Step 5: Solve for x
    x = 1,905,693.21/1,487.57
  6. Step 6: Final answer
    x = 1,281.08

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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.