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Finding the Fourth Proportional to 651.59, 969 and 631.08

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Solution

The fourth proportional to 651.59, 969 and 631.08 is: 938.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.59 : 969 = 631.08 : x
  2. Step 2: Convert to fraction form
    651.59/969 = 631.08/x
  3. Step 3: Cross multiply
    651.59x = 969 × 631.08
  4. Step 4: Simplify right side
    651.59x = 611,516.52
  5. Step 5: Solve for x
    x = 611,516.52/651.59
  6. Step 6: Final answer
    x = 938.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.