Home / 1,587.53-2,190.85-915.50

Finding the Fourth Proportional to 1,587.53, 2,190.85 and 915.50

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Solution

The fourth proportional to 1,587.53, 2,190.85 and 915.50 is: 1,263.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.53 : 2,190.85 = 915.50 : x
  2. Step 2: Convert to fraction form
    1,587.53/2,190.85 = 915.50/x
  3. Step 3: Cross multiply
    1,587.53x = 2,190.85 × 915.50
  4. Step 4: Simplify right side
    1,587.53x = 2,005,726.36
  5. Step 5: Solve for x
    x = 2,005,726.36/1,587.53
  6. Step 6: Final answer
    x = 1,263.42

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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.