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Finding the Fourth Proportional to 652,069.20, 978,679.80 and 385,496.40

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Solution

The fourth proportional to 652,069.20, 978,679.80 and 385,496.40 is: 578,585.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,069.20 : 978,679.80 = 385,496.40 : x
  2. Step 2: Convert to fraction form
    652,069.20/978,679.80 = 385,496.40/x
  3. Step 3: Cross multiply
    652,069.20x = 978,679.80 × 385,496.40
  4. Step 4: Simplify right side
    652,069.20x = 377,277,539,652.72
  5. Step 5: Solve for x
    x = 377,277,539,652.72/652,069.20
  6. Step 6: Final answer
    x = 578,585.13

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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.