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Finding the Fourth Proportional to 280,630.74, 387,255.87 and 153,281.73

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Solution

The fourth proportional to 280,630.74, 387,255.87 and 153,281.73 is: 211,520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,630.74 : 387,255.87 = 153,281.73 : x
  2. Step 2: Convert to fraction form
    280,630.74/387,255.87 = 153,281.73/x
  3. Step 3: Cross multiply
    280,630.74x = 387,255.87 × 153,281.73
  4. Step 4: Simplify right side
    280,630.74x = 59,359,249,706.26
  5. Step 5: Solve for x
    x = 59,359,249,706.26/280,630.74
  6. Step 6: Final answer
    x = 211,520.84

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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.