Home / 280,532.79-387,132.39-153,208.35

Finding the Fourth Proportional to 280,532.79, 387,132.39 and 153,208.35

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Solution

The fourth proportional to 280,532.79, 387,132.39 and 153,208.35 is: 211,425.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,532.79 : 387,132.39 = 153,208.35 : x
  2. Step 2: Convert to fraction form
    280,532.79/387,132.39 = 153,208.35/x
  3. Step 3: Cross multiply
    280,532.79x = 387,132.39 × 153,208.35
  4. Step 4: Simplify right side
    280,532.79x = 59,311,914,703.46
  5. Step 5: Solve for x
    x = 59,311,914,703.46/280,532.79
  6. Step 6: Final answer
    x = 211,425.96

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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.