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Finding the Fourth Proportional to 292,421.65, 403,901.76 and 211,721.35

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Solution

The fourth proportional to 292,421.65, 403,901.76 and 211,721.35 is: 292,436.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,421.65 : 403,901.76 = 211,721.35 : x
  2. Step 2: Convert to fraction form
    292,421.65/403,901.76 = 211,721.35/x
  3. Step 3: Cross multiply
    292,421.65x = 403,901.76 × 211,721.35
  4. Step 4: Simplify right side
    292,421.65x = 85,514,625,894.58
  5. Step 5: Solve for x
    x = 85,514,625,894.58/292,421.65
  6. Step 6: Final answer
    x = 292,436.03

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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.