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Finding the Fourth Proportional to 901.15, 1,243.62 and 508.15

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Solution

The fourth proportional to 901.15, 1,243.62 and 508.15 is: 701.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.15 : 1,243.62 = 508.15 : x
  2. Step 2: Convert to fraction form
    901.15/1,243.62 = 508.15/x
  3. Step 3: Cross multiply
    901.15x = 1,243.62 × 508.15
  4. Step 4: Simplify right side
    901.15x = 631,945.50
  5. Step 5: Solve for x
    x = 631,945.50/901.15
  6. Step 6: Final answer
    x = 701.27

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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.