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Finding the Fourth Proportional to 1,572.10, 2,359.95 and 923.20

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Solution

The fourth proportional to 1,572.10, 2,359.95 and 923.20 is: 1,385.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.10 : 2,359.95 = 923.20 : x
  2. Step 2: Convert to fraction form
    1,572.10/2,359.95 = 923.20/x
  3. Step 3: Cross multiply
    1,572.10x = 2,359.95 × 923.20
  4. Step 4: Simplify right side
    1,572.10x = 2,178,705.84
  5. Step 5: Solve for x
    x = 2,178,705.84/1,572.10
  6. Step 6: Final answer
    x = 1,385.86

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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.