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Finding the Fourth Proportional to 951.48, 1,312.38 and 620.10

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Solution

The fourth proportional to 951.48, 1,312.38 and 620.10 is: 855.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.48 : 1,312.38 = 620.10 : x
  2. Step 2: Convert to fraction form
    951.48/1,312.38 = 620.10/x
  3. Step 3: Cross multiply
    951.48x = 1,312.38 × 620.10
  4. Step 4: Simplify right side
    951.48x = 813,806.84
  5. Step 5: Solve for x
    x = 813,806.84/951.48
  6. Step 6: Final answer
    x = 855.31

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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.