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Finding the Fourth Proportional to 652,316.60, 978,474.90 and 439,740.20

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Solution

The fourth proportional to 652,316.60, 978,474.90 and 439,740.20 is: 659,610.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,316.60 : 978,474.90 = 439,740.20 : x
  2. Step 2: Convert to fraction form
    652,316.60/978,474.90 = 439,740.20/x
  3. Step 3: Cross multiply
    652,316.60x = 978,474.90 × 439,740.20
  4. Step 4: Simplify right side
    652,316.60x = 430,274,748,220.98
  5. Step 5: Solve for x
    x = 430,274,748,220.98/652,316.60
  6. Step 6: Final answer
    x = 659,610.30

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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.