Home / 280,734.89-387,423.72-153,418.68

Finding the Fourth Proportional to 280,734.89, 387,423.72 and 153,418.68

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Solution

The fourth proportional to 280,734.89, 387,423.72 and 153,418.68 is: 211,723.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,734.89 : 387,423.72 = 153,418.68 : x
  2. Step 2: Convert to fraction form
    280,734.89/387,423.72 = 153,418.68/x
  3. Step 3: Cross multiply
    280,734.89x = 387,423.72 × 153,418.68
  4. Step 4: Simplify right side
    280,734.89x = 59,438,035,723.09
  5. Step 5: Solve for x
    x = 59,438,035,723.09/280,734.89
  6. Step 6: Final answer
    x = 211,723.01

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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.