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Finding the Fourth Proportional to 1,246.47, 1,870.35 and 553.63

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Solution

The fourth proportional to 1,246.47, 1,870.35 and 553.63 is: 830.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.47 : 1,870.35 = 553.63 : x
  2. Step 2: Convert to fraction form
    1,246.47/1,870.35 = 553.63/x
  3. Step 3: Cross multiply
    1,246.47x = 1,870.35 × 553.63
  4. Step 4: Simplify right side
    1,246.47x = 1,035,481.87
  5. Step 5: Solve for x
    x = 1,035,481.87/1,246.47
  6. Step 6: Final answer
    x = 830.73

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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.