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Finding the Fourth Proportional to 520,886.60, 718,935.78 and 317,003.30

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Solution

The fourth proportional to 520,886.60, 718,935.78 and 317,003.30 is: 437,532.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,886.60 : 718,935.78 = 317,003.30 : x
  2. Step 2: Convert to fraction form
    520,886.60/718,935.78 = 317,003.30/x
  3. Step 3: Cross multiply
    520,886.60x = 718,935.78 × 317,003.30
  4. Step 4: Simplify right side
    520,886.60x = 227,905,010,341.44
  5. Step 5: Solve for x
    x = 227,905,010,341.44/520,886.60
  6. Step 6: Final answer
    x = 437,532.87

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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.