Home / 1,437.60-2,151.90-915.78

Finding the Fourth Proportional to 1,437.60, 2,151.90 and 915.78

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Solution

The fourth proportional to 1,437.60, 2,151.90 and 915.78 is: 1,370.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.60 : 2,151.90 = 915.78 : x
  2. Step 2: Convert to fraction form
    1,437.60/2,151.90 = 915.78/x
  3. Step 3: Cross multiply
    1,437.60x = 2,151.90 × 915.78
  4. Step 4: Simplify right side
    1,437.60x = 1,970,666.98
  5. Step 5: Solve for x
    x = 1,970,666.98/1,437.60
  6. Step 6: Final answer
    x = 1,370.80

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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.