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Finding the Fourth Proportional to 280,519.88, 387,118.86 and 153,195.47

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Solution

The fourth proportional to 280,519.88, 387,118.86 and 153,195.47 is: 211,410.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,519.88 : 387,118.86 = 153,195.47 : x
  2. Step 2: Convert to fraction form
    280,519.88/387,118.86 = 153,195.47/x
  3. Step 3: Cross multiply
    280,519.88x = 387,118.86 × 153,195.47
  4. Step 4: Simplify right side
    280,519.88x = 59,304,855,703.56
  5. Step 5: Solve for x
    x = 59,304,855,703.56/280,519.88
  6. Step 6: Final answer
    x = 211,410.53

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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.