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Finding the Fourth Proportional to 1,803.71, 2,489.13 and 1,007.07

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Solution

The fourth proportional to 1,803.71, 2,489.13 and 1,007.07 is: 1,389.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.71 : 2,489.13 = 1,007.07 : x
  2. Step 2: Convert to fraction form
    1,803.71/2,489.13 = 1,007.07/x
  3. Step 3: Cross multiply
    1,803.71x = 2,489.13 × 1,007.07
  4. Step 4: Simplify right side
    1,803.71x = 2,506,728.15
  5. Step 5: Solve for x
    x = 2,506,728.15/1,803.71
  6. Step 6: Final answer
    x = 1,389.76

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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.