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Finding the Fourth Proportional to 924.78, 1,275.63 and 630.18

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Solution

The fourth proportional to 924.78, 1,275.63 and 630.18 is: 869.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.78 : 1,275.63 = 630.18 : x
  2. Step 2: Convert to fraction form
    924.78/1,275.63 = 630.18/x
  3. Step 3: Cross multiply
    924.78x = 1,275.63 × 630.18
  4. Step 4: Simplify right side
    924.78x = 803,876.51
  5. Step 5: Solve for x
    x = 803,876.51/924.78
  6. Step 6: Final answer
    x = 869.26

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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.