Home / 280,690.11-387,343.76-153,365.54

Finding the Fourth Proportional to 280,690.11, 387,343.76 and 153,365.54

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Solution

The fourth proportional to 280,690.11, 387,343.76 and 153,365.54 is: 211,639.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,690.11 : 387,343.76 = 153,365.54 : x
  2. Step 2: Convert to fraction form
    280,690.11/387,343.76 = 153,365.54/x
  3. Step 3: Cross multiply
    280,690.11x = 387,343.76 × 153,365.54
  4. Step 4: Simplify right side
    280,690.11x = 59,405,182,214.48
  5. Step 5: Solve for x
    x = 59,405,182,214.48/280,690.11
  6. Step 6: Final answer
    x = 211,639.74

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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.