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Finding the Fourth Proportional to 520,455.64, 717,832.56 and 447,981.88

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Solution

The fourth proportional to 520,455.64, 717,832.56 and 447,981.88 is: 617,873.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,455.64 : 717,832.56 = 447,981.88 : x
  2. Step 2: Convert to fraction form
    520,455.64/717,832.56 = 447,981.88/x
  3. Step 3: Cross multiply
    520,455.64x = 717,832.56 × 447,981.88
  4. Step 4: Simplify right side
    520,455.64x = 321,575,979,754.01
  5. Step 5: Solve for x
    x = 321,575,979,754.01/520,455.64
  6. Step 6: Final answer
    x = 617,873.95

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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.