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Finding the Fourth Proportional to 652,067.40, 978,101.10 and 647,920.20

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Solution

The fourth proportional to 652,067.40, 978,101.10 and 647,920.20 is: 971,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,067.40 : 978,101.10 = 647,920.20 : x
  2. Step 2: Convert to fraction form
    652,067.40/978,101.10 = 647,920.20/x
  3. Step 3: Cross multiply
    652,067.40x = 978,101.10 × 647,920.20
  4. Step 4: Simplify right side
    652,067.40x = 633,731,460,332.22
  5. Step 5: Solve for x
    x = 633,731,460,332.22/652,067.40
  6. Step 6: Final answer
    x = 971,880.30

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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.