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Finding the Fourth Proportional to 978,359.80, 1,467,539.70 and 347,337.40

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Solution

The fourth proportional to 978,359.80, 1,467,539.70 and 347,337.40 is: 521,006.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,359.80 : 1,467,539.70 = 347,337.40 : x
  2. Step 2: Convert to fraction form
    978,359.80/1,467,539.70 = 347,337.40/x
  3. Step 3: Cross multiply
    978,359.80x = 1,467,539.70 × 347,337.40
  4. Step 4: Simplify right side
    978,359.80x = 509,731,423,794.78
  5. Step 5: Solve for x
    x = 509,731,423,794.78/978,359.80
  6. Step 6: Final answer
    x = 521,006.10

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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.