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Finding the Fourth Proportional to 1,807.95, 2,711.93 and 653.43

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Solution

The fourth proportional to 1,807.95, 2,711.93 and 653.43 is: 980.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.95 : 2,711.93 = 653.43 : x
  2. Step 2: Convert to fraction form
    1,807.95/2,711.93 = 653.43/x
  3. Step 3: Cross multiply
    1,807.95x = 2,711.93 × 653.43
  4. Step 4: Simplify right side
    1,807.95x = 1,772,053.15
  5. Step 5: Solve for x
    x = 1,772,053.15/1,807.95
  6. Step 6: Final answer
    x = 980.15

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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.