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Finding the Fourth Proportional to 521,398.77, 782,393.99 and 281,509.46

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Solution

The fourth proportional to 521,398.77, 782,393.99 and 281,509.46 is: 422,423.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,398.77 : 782,393.99 = 281,509.46 : x
  2. Step 2: Convert to fraction form
    521,398.77/782,393.99 = 281,509.46/x
  3. Step 3: Cross multiply
    521,398.77x = 782,393.99 × 281,509.46
  4. Step 4: Simplify right side
    521,398.77x = 220,251,308,224.60
  5. Step 5: Solve for x
    x = 220,251,308,224.60/521,398.77
  6. Step 6: Final answer
    x = 422,423.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.