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Finding the Fourth Proportional to 387,092,309.60, 579,681,870.60 and 256,995,552.80

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Solution

The fourth proportional to 387,092,309.60, 579,681,870.60 and 256,995,552.80 is: 384,858,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,092,309.60 : 579,681,870.60 = 256,995,552.80 : x
  2. Step 2: Convert to fraction form
    387,092,309.60/579,681,870.60 = 256,995,552.80/x
  3. Step 3: Cross multiply
    387,092,309.60x = 579,681,870.60 × 256,995,552.80
  4. Step 4: Simplify right side
    387,092,309.60x = 148,975,662,782,985,088
  5. Step 5: Solve for x
    x = 148,975,662,782,985,088/387,092,309.60
  6. Step 6: Final answer
    x = 384,858,234.30

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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.