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Finding the Fourth Proportional to 981.95, 1,470.99 and 570.22

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Solution

The fourth proportional to 981.95, 1,470.99 and 570.22 is: 854.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.95 : 1,470.99 = 570.22 : x
  2. Step 2: Convert to fraction form
    981.95/1,470.99 = 570.22/x
  3. Step 3: Cross multiply
    981.95x = 1,470.99 × 570.22
  4. Step 4: Simplify right side
    981.95x = 838,784.24
  5. Step 5: Solve for x
    x = 838,784.24/981.95
  6. Step 6: Final answer
    x = 854.21

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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.