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Finding the Fourth Proportional to 371,855.13, 513,140.43 and 210,712.11

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Solution

The fourth proportional to 371,855.13, 513,140.43 and 210,712.11 is: 290,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,855.13 : 513,140.43 = 210,712.11 : x
  2. Step 2: Convert to fraction form
    371,855.13/513,140.43 = 210,712.11/x
  3. Step 3: Cross multiply
    371,855.13x = 513,140.43 × 210,712.11
  4. Step 4: Simplify right side
    371,855.13x = 108,124,902,731.61
  5. Step 5: Solve for x
    x = 108,124,902,731.61/371,855.13
  6. Step 6: Final answer
    x = 290,771.58

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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.