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Finding the Fourth Proportional to 472,392,721.20, 659,819,259.60 and 472,392,721.20

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Solution

The fourth proportional to 472,392,721.20, 659,819,259.60 and 472,392,721.20 is: 659,819,259.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,392,721.20 : 659,819,259.60 = 472,392,721.20 : x
  2. Step 2: Convert to fraction form
    472,392,721.20/659,819,259.60 = 472,392,721.20/x
  3. Step 3: Cross multiply
    472,392,721.20x = 659,819,259.60 × 472,392,721.20
  4. Step 4: Simplify right side
    472,392,721.20x = 311,693,815,542,613,248
  5. Step 5: Solve for x
    x = 311,693,815,542,613,248/472,392,721.20
  6. Step 6: Final answer
    x = 659,819,259.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.