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Finding the Fourth Proportional to 559,872,021.20, 839,808,031.80 and 387,300,808.40

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Solution

The fourth proportional to 559,872,021.20, 839,808,031.80 and 387,300,808.40 is: 580,951,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,872,021.20 : 839,808,031.80 = 387,300,808.40 : x
  2. Step 2: Convert to fraction form
    559,872,021.20/839,808,031.80 = 387,300,808.40/x
  3. Step 3: Cross multiply
    559,872,021.20x = 839,808,031.80 × 387,300,808.40
  4. Step 4: Simplify right side
    559,872,021.20x = 325,258,329,616,952,896
  5. Step 5: Solve for x
    x = 325,258,329,616,952,896/559,872,021.20
  6. Step 6: Final answer
    x = 580,951,212.60

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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.