Home / 387,939.36-535,312.80-218,169.84

Finding the Fourth Proportional to 387,939.36, 535,312.80 and 218,169.84

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Solution

The fourth proportional to 387,939.36, 535,312.80 and 218,169.84 is: 301,049.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,939.36 : 535,312.80 = 218,169.84 : x
  2. Step 2: Convert to fraction form
    387,939.36/535,312.80 = 218,169.84/x
  3. Step 3: Cross multiply
    387,939.36x = 535,312.80 × 218,169.84
  4. Step 4: Simplify right side
    387,939.36x = 116,789,107,925.95
  5. Step 5: Solve for x
    x = 116,789,107,925.95/387,939.36
  6. Step 6: Final answer
    x = 301,049.91

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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.