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Finding the Fourth Proportional to 280,818.50, 387,529.54 and 153,494.60

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Solution

The fourth proportional to 280,818.50, 387,529.54 and 153,494.60 is: 211,822.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,818.50 : 387,529.54 = 153,494.60 : x
  2. Step 2: Convert to fraction form
    280,818.50/387,529.54 = 153,494.60/x
  3. Step 3: Cross multiply
    280,818.50x = 387,529.54 × 153,494.60
  4. Step 4: Simplify right side
    280,818.50x = 59,483,691,730.48
  5. Step 5: Solve for x
    x = 59,483,691,730.48/280,818.50
  6. Step 6: Final answer
    x = 211,822.55

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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.