Home / 387,911.55-535,320.57-215,836.75

Finding the Fourth Proportional to 387,911.55, 535,320.57 and 215,836.75

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Solution

The fourth proportional to 387,911.55, 535,320.57 and 215,836.75 is: 297,856.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,911.55 : 535,320.57 = 215,836.75 : x
  2. Step 2: Convert to fraction form
    387,911.55/535,320.57 = 215,836.75/x
  3. Step 3: Cross multiply
    387,911.55x = 535,320.57 × 215,836.75
  4. Step 4: Simplify right side
    387,911.55x = 115,541,852,036.95
  5. Step 5: Solve for x
    x = 115,541,852,036.95/387,911.55
  6. Step 6: Final answer
    x = 297,856.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.