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Finding the Fourth Proportional to 978,353.80, 1,467,530.70 and 347,331.40

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Solution

The fourth proportional to 978,353.80, 1,467,530.70 and 347,331.40 is: 520,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,353.80 : 1,467,530.70 = 347,331.40 : x
  2. Step 2: Convert to fraction form
    978,353.80/1,467,530.70 = 347,331.40/x
  3. Step 3: Cross multiply
    978,353.80x = 1,467,530.70 × 347,331.40
  4. Step 4: Simplify right side
    978,353.80x = 509,719,492,573.98
  5. Step 5: Solve for x
    x = 509,719,492,573.98/978,353.80
  6. Step 6: Final answer
    x = 520,997.10

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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.