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Finding the Fourth Proportional to 652,187.60, 978,281.40 and 439,611.20

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Solution

The fourth proportional to 652,187.60, 978,281.40 and 439,611.20 is: 659,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,187.60 : 978,281.40 = 439,611.20 : x
  2. Step 2: Convert to fraction form
    652,187.60/978,281.40 = 439,611.20/x
  3. Step 3: Cross multiply
    652,187.60x = 978,281.40 × 439,611.20
  4. Step 4: Simplify right side
    652,187.60x = 430,063,460,191.68
  5. Step 5: Solve for x
    x = 430,063,460,191.68/652,187.60
  6. Step 6: Final answer
    x = 659,416.80

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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.