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Finding the Fourth Proportional to 520,387.16, 717,871.20 and 348,312.44

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Solution

The fourth proportional to 520,387.16, 717,871.20 and 348,312.44 is: 480,495.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,387.16 : 717,871.20 = 348,312.44 : x
  2. Step 2: Convert to fraction form
    520,387.16/717,871.20 = 348,312.44/x
  3. Step 3: Cross multiply
    520,387.16x = 717,871.20 × 348,312.44
  4. Step 4: Simplify right side
    520,387.16x = 250,043,469,277.73
  5. Step 5: Solve for x
    x = 250,043,469,277.73/520,387.16
  6. Step 6: Final answer
    x = 480,495.08

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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.