Home / 387,780.08-535,126.04-218,025.12

Finding the Fourth Proportional to 387,780.08, 535,126.04 and 218,025.12

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Solution

The fourth proportional to 387,780.08, 535,126.04 and 218,025.12 is: 300,868.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,780.08 : 535,126.04 = 218,025.12 : x
  2. Step 2: Convert to fraction form
    387,780.08/535,126.04 = 218,025.12/x
  3. Step 3: Cross multiply
    387,780.08x = 535,126.04 × 218,025.12
  4. Step 4: Simplify right side
    387,780.08x = 116,670,919,086.13
  5. Step 5: Solve for x
    x = 116,670,919,086.13/387,780.08
  6. Step 6: Final answer
    x = 300,868.78

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1.5x scale

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.