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Finding the Fourth Proportional to 402,883,135.80, 604,324,703.70 and 280,439,129.40

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Solution

The fourth proportional to 402,883,135.80, 604,324,703.70 and 280,439,129.40 is: 420,658,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,883,135.80 : 604,324,703.70 = 280,439,129.40 : x
  2. Step 2: Convert to fraction form
    402,883,135.80/604,324,703.70 = 280,439,129.40/x
  3. Step 3: Cross multiply
    402,883,135.80x = 604,324,703.70 × 280,439,129.40
  4. Step 4: Simplify right side
    402,883,135.80x = 169,476,293,780,540,960
  5. Step 5: Solve for x
    x = 169,476,293,780,540,960/402,883,135.80
  6. Step 6: Final answer
    x = 420,658,694.10

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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.