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Finding the Fourth Proportional to 915.86, 1,264.14 and 632.72

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Solution

The fourth proportional to 915.86, 1,264.14 and 632.72 is: 873.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.86 : 1,264.14 = 632.72 : x
  2. Step 2: Convert to fraction form
    915.86/1,264.14 = 632.72/x
  3. Step 3: Cross multiply
    915.86x = 1,264.14 × 632.72
  4. Step 4: Simplify right side
    915.86x = 799,846.66
  5. Step 5: Solve for x
    x = 799,846.66/915.86
  6. Step 6: Final answer
    x = 873.33

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Double scale
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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.