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Finding the Fourth Proportional to 1,802.72, 2,487.75 and 974.72

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Solution

The fourth proportional to 1,802.72, 2,487.75 and 974.72 is: 1,345.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,802.72 : 2,487.75 = 974.72 : x
  2. Step 2: Convert to fraction form
    1,802.72/2,487.75 = 974.72/x
  3. Step 3: Cross multiply
    1,802.72x = 2,487.75 × 974.72
  4. Step 4: Simplify right side
    1,802.72x = 2,424,859.68
  5. Step 5: Solve for x
    x = 2,424,859.68/1,802.72
  6. Step 6: Final answer
    x = 1,345.11

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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.