Home / 280,890.36-387,630-153,565.92

Finding the Fourth Proportional to 280,890.36, 387,630 and 153,565.92

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Solution

The fourth proportional to 280,890.36, 387,630 and 153,565.92 is: 211,921.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,890.36 : 387,630 = 153,565.92 : x
  2. Step 2: Convert to fraction form
    280,890.36/387,630 = 153,565.92/x
  3. Step 3: Cross multiply
    280,890.36x = 387,630 × 153,565.92
  4. Step 4: Simplify right side
    280,890.36x = 59,526,757,569.60
  5. Step 5: Solve for x
    x = 59,526,757,569.60/280,890.36
  6. Step 6: Final answer
    x = 211,921.68

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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.