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Finding the Fourth Proportional to 652,378.60, 978,567.90 and 439,802.20

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Solution

The fourth proportional to 652,378.60, 978,567.90 and 439,802.20 is: 659,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,378.60 : 978,567.90 = 439,802.20 : x
  2. Step 2: Convert to fraction form
    652,378.60/978,567.90 = 439,802.20/x
  3. Step 3: Cross multiply
    652,378.60x = 978,567.90 × 439,802.20
  4. Step 4: Simplify right side
    652,378.60x = 430,376,315,269.38
  5. Step 5: Solve for x
    x = 430,376,315,269.38/652,378.60
  6. Step 6: Final answer
    x = 659,703.30

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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.