Home / 1,411.52-2,117.28-385.52

Finding the Fourth Proportional to 1,411.52, 2,117.28 and 385.52

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Solution

The fourth proportional to 1,411.52, 2,117.28 and 385.52 is: 578.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.52 : 2,117.28 = 385.52 : x
  2. Step 2: Convert to fraction form
    1,411.52/2,117.28 = 385.52/x
  3. Step 3: Cross multiply
    1,411.52x = 2,117.28 × 385.52
  4. Step 4: Simplify right side
    1,411.52x = 816,253.79
  5. Step 5: Solve for x
    x = 816,253.79/1,411.52
  6. Step 6: Final answer
    x = 578.28

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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.