Home / 257,211.18-355,044.51-209,381.49

Finding the Fourth Proportional to 257,211.18, 355,044.51 and 209,381.49

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Solution

The fourth proportional to 257,211.18, 355,044.51 and 209,381.49 is: 289,022.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,211.18 : 355,044.51 = 209,381.49 : x
  2. Step 2: Convert to fraction form
    257,211.18/355,044.51 = 209,381.49/x
  3. Step 3: Cross multiply
    257,211.18x = 355,044.51 × 209,381.49
  4. Step 4: Simplify right side
    257,211.18x = 74,339,748,520.12
  5. Step 5: Solve for x
    x = 74,339,748,520.12/257,211.18
  6. Step 6: Final answer
    x = 289,022.23

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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.