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Finding the Fourth Proportional to 1,246.55, 1,870.13 and 369.05

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Solution

The fourth proportional to 1,246.55, 1,870.13 and 369.05 is: 553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.55 : 1,870.13 = 369.05 : x
  2. Step 2: Convert to fraction form
    1,246.55/1,870.13 = 369.05/x
  3. Step 3: Cross multiply
    1,246.55x = 1,870.13 × 369.05
  4. Step 4: Simplify right side
    1,246.55x = 690,160.28
  5. Step 5: Solve for x
    x = 690,160.28/1,246.55
  6. Step 6: Final answer
    x = 553.66

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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.