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Finding the Fourth Proportional to 1,570.62, 2,358.45 and 1,328.70

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Solution

The fourth proportional to 1,570.62, 2,358.45 and 1,328.70 is: 1,995.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.62 : 2,358.45 = 1,328.70 : x
  2. Step 2: Convert to fraction form
    1,570.62/2,358.45 = 1,328.70/x
  3. Step 3: Cross multiply
    1,570.62x = 2,358.45 × 1,328.70
  4. Step 4: Simplify right side
    1,570.62x = 3,133,672.52
  5. Step 5: Solve for x
    x = 3,133,672.52/1,570.62
  6. Step 6: Final answer
    x = 1,995.18

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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.