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Finding the Fourth Proportional to 1,478.70, 2,219.70 and 1,010.52

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Solution

The fourth proportional to 1,478.70, 2,219.70 and 1,010.52 is: 1,516.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.70 : 2,219.70 = 1,010.52 : x
  2. Step 2: Convert to fraction form
    1,478.70/2,219.70 = 1,010.52/x
  3. Step 3: Cross multiply
    1,478.70x = 2,219.70 × 1,010.52
  4. Step 4: Simplify right side
    1,478.70x = 2,243,051.24
  5. Step 5: Solve for x
    x = 2,243,051.24/1,478.70
  6. Step 6: Final answer
    x = 1,516.91

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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.