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Finding the Fourth Proportional to 885.95, 1,328.89 and 424.05

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Solution

The fourth proportional to 885.95, 1,328.89 and 424.05 is: 636.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.95 : 1,328.89 = 424.05 : x
  2. Step 2: Convert to fraction form
    885.95/1,328.89 = 424.05/x
  3. Step 3: Cross multiply
    885.95x = 1,328.89 × 424.05
  4. Step 4: Simplify right side
    885.95x = 563,515.80
  5. Step 5: Solve for x
    x = 563,515.80/885.95
  6. Step 6: Final answer
    x = 636.06

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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.