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Finding the Fourth Proportional to 885.56, 1,317.31 and 876.20

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Solution

The fourth proportional to 885.56, 1,317.31 and 876.20 is: 1,303.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.56 : 1,317.31 = 876.20 : x
  2. Step 2: Convert to fraction form
    885.56/1,317.31 = 876.20/x
  3. Step 3: Cross multiply
    885.56x = 1,317.31 × 876.20
  4. Step 4: Simplify right side
    885.56x = 1,154,227.02
  5. Step 5: Solve for x
    x = 1,154,227.02/885.56
  6. Step 6: Final answer
    x = 1,303.39

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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.