Home / 387,619.56-534,888.36-217,879.20

Finding the Fourth Proportional to 387,619.56, 534,888.36 and 217,879.20

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Solution

The fourth proportional to 387,619.56, 534,888.36 and 217,879.20 is: 300,658.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,619.56 : 534,888.36 = 217,879.20 : x
  2. Step 2: Convert to fraction form
    387,619.56/534,888.36 = 217,879.20/x
  3. Step 3: Cross multiply
    387,619.56x = 534,888.36 × 217,879.20
  4. Step 4: Simplify right side
    387,619.56x = 116,541,047,966.11
  5. Step 5: Solve for x
    x = 116,541,047,966.11/387,619.56
  6. Step 6: Final answer
    x = 300,658.33

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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.