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Finding the Fourth Proportional to 652,042.20, 978,063.30 and 430,426.20

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Solution

The fourth proportional to 652,042.20, 978,063.30 and 430,426.20 is: 645,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,042.20 : 978,063.30 = 430,426.20 : x
  2. Step 2: Convert to fraction form
    652,042.20/978,063.30 = 430,426.20/x
  3. Step 3: Cross multiply
    652,042.20x = 978,063.30 × 430,426.20
  4. Step 4: Simplify right side
    652,042.20x = 420,984,069,578.46
  5. Step 5: Solve for x
    x = 420,984,069,578.46/652,042.20
  6. Step 6: Final answer
    x = 645,639.30

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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.