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Finding the Fourth Proportional to 313,070.67, 431,899.83 and 211,058.87

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Solution

The fourth proportional to 313,070.67, 431,899.83 and 211,058.87 is: 291,168.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,070.67 : 431,899.83 = 211,058.87 : x
  2. Step 2: Convert to fraction form
    313,070.67/431,899.83 = 211,058.87/x
  3. Step 3: Cross multiply
    313,070.67x = 431,899.83 × 211,058.87
  4. Step 4: Simplify right side
    313,070.67x = 91,156,287,913.49
  5. Step 5: Solve for x
    x = 91,156,287,913.49/313,070.67
  6. Step 6: Final answer
    x = 291,168.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.