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Finding the Fourth Proportional to 915.40, 1,263.04 and 583.70

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Solution

The fourth proportional to 915.40, 1,263.04 and 583.70 is: 805.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.40 : 1,263.04 = 583.70 : x
  2. Step 2: Convert to fraction form
    915.40/1,263.04 = 583.70/x
  3. Step 3: Cross multiply
    915.40x = 1,263.04 × 583.70
  4. Step 4: Simplify right side
    915.40x = 737,236.45
  5. Step 5: Solve for x
    x = 737,236.45/915.40
  6. Step 6: Final answer
    x = 805.37

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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.