Home / 278,643.09-384,391.13-165,385.65

Finding the Fourth Proportional to 278,643.09, 384,391.13 and 165,385.65

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Solution

The fourth proportional to 278,643.09, 384,391.13 and 165,385.65 is: 228,151.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,643.09 : 384,391.13 = 165,385.65 : x
  2. Step 2: Convert to fraction form
    278,643.09/384,391.13 = 165,385.65/x
  3. Step 3: Cross multiply
    278,643.09x = 384,391.13 × 165,385.65
  4. Step 4: Simplify right side
    278,643.09x = 63,572,776,062.36
  5. Step 5: Solve for x
    x = 63,572,776,062.36/278,643.09
  6. Step 6: Final answer
    x = 228,151.27

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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.