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Finding the Fourth Proportional to 1,641.78, 2,462.70 and 915.98

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Solution

The fourth proportional to 1,641.78, 2,462.70 and 915.98 is: 1,373.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.78 : 2,462.70 = 915.98 : x
  2. Step 2: Convert to fraction form
    1,641.78/2,462.70 = 915.98/x
  3. Step 3: Cross multiply
    1,641.78x = 2,462.70 × 915.98
  4. Step 4: Simplify right side
    1,641.78x = 2,255,783.95
  5. Step 5: Solve for x
    x = 2,255,783.95/1,641.78
  6. Step 6: Final answer
    x = 1,373.99

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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.