Home / 280,519.81-387,123.60-167,320.69

Finding the Fourth Proportional to 280,519.81, 387,123.60 and 167,320.69

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Solution

The fourth proportional to 280,519.81, 387,123.60 and 167,320.69 is: 230,906.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,519.81 : 387,123.60 = 167,320.69 : x
  2. Step 2: Convert to fraction form
    280,519.81/387,123.60 = 167,320.69/x
  3. Step 3: Cross multiply
    280,519.81x = 387,123.60 × 167,320.69
  4. Step 4: Simplify right side
    280,519.81x = 64,773,787,526.93
  5. Step 5: Solve for x
    x = 64,773,787,526.93/280,519.81
  6. Step 6: Final answer
    x = 230,906.29

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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.