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Finding the Fourth Proportional to 924.80, 1,276.43 and 630.77

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Solution

The fourth proportional to 924.80, 1,276.43 and 630.77 is: 870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.80 : 1,276.43 = 630.77 : x
  2. Step 2: Convert to fraction form
    924.80/1,276.43 = 630.77/x
  3. Step 3: Cross multiply
    924.80x = 1,276.43 × 630.77
  4. Step 4: Simplify right side
    924.80x = 805,124.22
  5. Step 5: Solve for x
    x = 805,124.22/924.80
  6. Step 6: Final answer
    x = 870.60

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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.