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Finding the Fourth Proportional to 900.87, 1,243.23 and 508.02

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Solution

The fourth proportional to 900.87, 1,243.23 and 508.02 is: 701.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.87 : 1,243.23 = 508.02 : x
  2. Step 2: Convert to fraction form
    900.87/1,243.23 = 508.02/x
  3. Step 3: Cross multiply
    900.87x = 1,243.23 × 508.02
  4. Step 4: Simplify right side
    900.87x = 631,585.70
  5. Step 5: Solve for x
    x = 631,585.70/900.87
  6. Step 6: Final answer
    x = 701.08

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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.