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Finding the Fourth Proportional to 486,538.70, 671,423.16 and 271,678.64

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Solution

The fourth proportional to 486,538.70, 671,423.16 and 271,678.64 is: 374,916.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,538.70 : 671,423.16 = 271,678.64 : x
  2. Step 2: Convert to fraction form
    486,538.70/671,423.16 = 271,678.64/x
  3. Step 3: Cross multiply
    486,538.70x = 671,423.16 × 271,678.64
  4. Step 4: Simplify right side
    486,538.70x = 182,411,330,973.30
  5. Step 5: Solve for x
    x = 182,411,330,973.30/486,538.70
  6. Step 6: Final answer
    x = 374,916.39

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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.