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Finding the Fourth Proportional to 486,654, 671,394.60 and 305,291.76

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Solution

The fourth proportional to 486,654, 671,394.60 and 305,291.76 is: 421,184.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,654 : 671,394.60 = 305,291.76 : x
  2. Step 2: Convert to fraction form
    486,654/671,394.60 = 305,291.76/x
  3. Step 3: Cross multiply
    486,654x = 671,394.60 × 305,291.76
  4. Step 4: Simplify right side
    486,654x = 204,971,239,088.50
  5. Step 5: Solve for x
    x = 204,971,239,088.50/486,654
  6. Step 6: Final answer
    x = 421,184.74

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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.