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Finding the Fourth Proportional to 925.21, 1,277.15 and 630.64

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Solution

The fourth proportional to 925.21, 1,277.15 and 630.64 is: 870.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.21 : 1,277.15 = 630.64 : x
  2. Step 2: Convert to fraction form
    925.21/1,277.15 = 630.64/x
  3. Step 3: Cross multiply
    925.21x = 1,277.15 × 630.64
  4. Step 4: Simplify right side
    925.21x = 805,412.34
  5. Step 5: Solve for x
    x = 805,412.34/925.21
  6. Step 6: Final answer
    x = 870.52

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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.