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Finding the Fourth Proportional to 389,363.48, 537,320.59 and 217,279.65

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Solution

The fourth proportional to 389,363.48, 537,320.59 and 217,279.65 is: 299,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,363.48 : 537,320.59 = 217,279.65 : x
  2. Step 2: Convert to fraction form
    389,363.48/537,320.59 = 217,279.65/x
  3. Step 3: Cross multiply
    389,363.48x = 537,320.59 × 217,279.65
  4. Step 4: Simplify right side
    389,363.48x = 116,748,829,732.99
  5. Step 5: Solve for x
    x = 116,748,829,732.99/389,363.48
  6. Step 6: Final answer
    x = 299,845.35

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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.