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Finding the Fourth Proportional to 832.77, 1,248.98 and 312.75

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Solution

The fourth proportional to 832.77, 1,248.98 and 312.75 is: 469.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.77 : 1,248.98 = 312.75 : x
  2. Step 2: Convert to fraction form
    832.77/1,248.98 = 312.75/x
  3. Step 3: Cross multiply
    832.77x = 1,248.98 × 312.75
  4. Step 4: Simplify right side
    832.77x = 390,616.93
  5. Step 5: Solve for x
    x = 390,616.93/832.77
  6. Step 6: Final answer
    x = 469.06

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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.