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Finding the Fourth Proportional to 372,672.23, 514,300.21 and 209,357.40

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Solution

The fourth proportional to 372,672.23, 514,300.21 and 209,357.40 is: 288,920.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,672.23 : 514,300.21 = 209,357.40 : x
  2. Step 2: Convert to fraction form
    372,672.23/514,300.21 = 209,357.40/x
  3. Step 3: Cross multiply
    372,672.23x = 514,300.21 × 209,357.40
  4. Step 4: Simplify right side
    372,672.23x = 107,672,554,261.66
  5. Step 5: Solve for x
    x = 107,672,554,261.66/372,672.23
  6. Step 6: Final answer
    x = 288,920.25

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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.