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Finding the Fourth Proportional to 543,720.84, 815,918.06 and 316,123.58

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Solution

The fourth proportional to 543,720.84, 815,918.06 and 316,123.58 is: 474,381.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,720.84 : 815,918.06 = 316,123.58 : x
  2. Step 2: Convert to fraction form
    543,720.84/815,918.06 = 316,123.58/x
  3. Step 3: Cross multiply
    543,720.84x = 815,918.06 × 316,123.58
  4. Step 4: Simplify right side
    543,720.84x = 257,930,934,824.57
  5. Step 5: Solve for x
    x = 257,930,934,824.57/543,720.84
  6. Step 6: Final answer
    x = 474,381.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.