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Finding the Fourth Proportional to 387,081,781.80, 580,622,672.70 and 356,176,847.40

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Solution

The fourth proportional to 387,081,781.80, 580,622,672.70 and 356,176,847.40 is: 534,265,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,081,781.80 : 580,622,672.70 = 356,176,847.40 : x
  2. Step 2: Convert to fraction form
    387,081,781.80/580,622,672.70 = 356,176,847.40/x
  3. Step 3: Cross multiply
    387,081,781.80x = 580,622,672.70 × 356,176,847.40
  4. Step 4: Simplify right side
    387,081,781.80x = 206,804,353,091,248,064
  5. Step 5: Solve for x
    x = 206,804,353,091,248,064/387,081,781.80
  6. Step 6: Final answer
    x = 534,265,271.10

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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.