Home / 280,349.40-386,891.34-153,031.80

Finding the Fourth Proportional to 280,349.40, 386,891.34 and 153,031.80

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Solution

The fourth proportional to 280,349.40, 386,891.34 and 153,031.80 is: 211,188.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,349.40 : 386,891.34 = 153,031.80 : x
  2. Step 2: Convert to fraction form
    280,349.40/386,891.34 = 153,031.80/x
  3. Step 3: Cross multiply
    280,349.40x = 386,891.34 × 153,031.80
  4. Step 4: Simplify right side
    280,349.40x = 59,206,678,164.61
  5. Step 5: Solve for x
    x = 59,206,678,164.61/280,349.40
  6. Step 6: Final answer
    x = 211,188.89

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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.