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Finding the Fourth Proportional to 978,219.20, 1,467,328.80 and 710,530.40

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Solution

The fourth proportional to 978,219.20, 1,467,328.80 and 710,530.40 is: 1,065,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,219.20 : 1,467,328.80 = 710,530.40 : x
  2. Step 2: Convert to fraction form
    978,219.20/1,467,328.80 = 710,530.40/x
  3. Step 3: Cross multiply
    978,219.20x = 1,467,328.80 × 710,530.40
  4. Step 4: Simplify right side
    978,219.20x = 1,042,581,719,195.52
  5. Step 5: Solve for x
    x = 1,042,581,719,195.52/978,219.20
  6. Step 6: Final answer
    x = 1,065,795.60

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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.