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Finding the Fourth Proportional to 313,243,280.80, 469,864,921.20 and 266,885,879.20

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Solution

The fourth proportional to 313,243,280.80, 469,864,921.20 and 266,885,879.20 is: 400,328,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,243,280.80 : 469,864,921.20 = 266,885,879.20 : x
  2. Step 2: Convert to fraction form
    313,243,280.80/469,864,921.20 = 266,885,879.20/x
  3. Step 3: Cross multiply
    313,243,280.80x = 469,864,921.20 × 266,885,879.20
  4. Step 4: Simplify right side
    313,243,280.80x = 125,400,312,599,700,704
  5. Step 5: Solve for x
    x = 125,400,312,599,700,704/313,243,280.80
  6. Step 6: Final answer
    x = 400,328,818.80

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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.