Home / 280,479.57-387,061.77-153,155.28

Finding the Fourth Proportional to 280,479.57, 387,061.77 and 153,155.28

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Solution

The fourth proportional to 280,479.57, 387,061.77 and 153,155.28 is: 211,354.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,479.57 : 387,061.77 = 153,155.28 : x
  2. Step 2: Convert to fraction form
    280,479.57/387,061.77 = 153,155.28/x
  3. Step 3: Cross multiply
    280,479.57x = 387,061.77 × 153,155.28
  4. Step 4: Simplify right side
    280,479.57x = 59,280,553,761.65
  5. Step 5: Solve for x
    x = 59,280,553,761.65/280,479.57
  6. Step 6: Final answer
    x = 211,354.27

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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.