Home / 280,721.12-387,285.16-173,104.32

Finding the Fourth Proportional to 280,721.12, 387,285.16 and 173,104.32

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Solution

The fourth proportional to 280,721.12, 387,285.16 and 173,104.32 is: 238,816.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,721.12 : 387,285.16 = 173,104.32 : x
  2. Step 2: Convert to fraction form
    280,721.12/387,285.16 = 173,104.32/x
  3. Step 3: Cross multiply
    280,721.12x = 387,285.16 × 173,104.32
  4. Step 4: Simplify right side
    280,721.12x = 67,040,734,267.89
  5. Step 5: Solve for x
    x = 67,040,734,267.89/280,721.12
  6. Step 6: Final answer
    x = 238,816.14

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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.