Home / 1,440.19-2,160.17-385.92

Finding the Fourth Proportional to 1,440.19, 2,160.17 and 385.92

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Solution

The fourth proportional to 1,440.19, 2,160.17 and 385.92 is: 578.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.19 : 2,160.17 = 385.92 : x
  2. Step 2: Convert to fraction form
    1,440.19/2,160.17 = 385.92/x
  3. Step 3: Cross multiply
    1,440.19x = 2,160.17 × 385.92
  4. Step 4: Simplify right side
    1,440.19x = 833,652.81
  5. Step 5: Solve for x
    x = 833,652.81/1,440.19
  6. Step 6: Final answer
    x = 578.85

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Double scale
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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.