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Finding the Fourth Proportional to 372,343.48, 513,842.88 and 211,209.40

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Solution

The fourth proportional to 372,343.48, 513,842.88 and 211,209.40 is: 291,474.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,343.48 : 513,842.88 = 211,209.40 : x
  2. Step 2: Convert to fraction form
    372,343.48/513,842.88 = 211,209.40/x
  3. Step 3: Cross multiply
    372,343.48x = 513,842.88 × 211,209.40
  4. Step 4: Simplify right side
    372,343.48x = 108,528,446,379.07
  5. Step 5: Solve for x
    x = 108,528,446,379.07/372,343.48
  6. Step 6: Final answer
    x = 291,474.01

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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.