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Finding the Fourth Proportional to 915.59, 1,263.50 and 495.94

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Solution

The fourth proportional to 915.59, 1,263.50 and 495.94 is: 684.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.59 : 1,263.50 = 495.94 : x
  2. Step 2: Convert to fraction form
    915.59/1,263.50 = 495.94/x
  3. Step 3: Cross multiply
    915.59x = 1,263.50 × 495.94
  4. Step 4: Simplify right side
    915.59x = 626,616.41
  5. Step 5: Solve for x
    x = 626,616.41/915.59
  6. Step 6: Final answer
    x = 684.38

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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.