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Finding the Fourth Proportional to 1,440.48, 2,160.36 and 574.32

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Solution

The fourth proportional to 1,440.48, 2,160.36 and 574.32 is: 861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.48 : 2,160.36 = 574.32 : x
  2. Step 2: Convert to fraction form
    1,440.48/2,160.36 = 574.32/x
  3. Step 3: Cross multiply
    1,440.48x = 2,160.36 × 574.32
  4. Step 4: Simplify right side
    1,440.48x = 1,240,737.96
  5. Step 5: Solve for x
    x = 1,240,737.96/1,440.48
  6. Step 6: Final answer
    x = 861.34

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1.5x scale

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.