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Finding the Fourth Proportional to 915.46, 1,373.70 and 607.45

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Solution

The fourth proportional to 915.46, 1,373.70 and 607.45 is: 911.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.46 : 1,373.70 = 607.45 : x
  2. Step 2: Convert to fraction form
    915.46/1,373.70 = 607.45/x
  3. Step 3: Cross multiply
    915.46x = 1,373.70 × 607.45
  4. Step 4: Simplify right side
    915.46x = 834,454.07
  5. Step 5: Solve for x
    x = 834,454.07/915.46
  6. Step 6: Final answer
    x = 911.51

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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.