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Finding the Fourth Proportional to 658,064.21, 908,189.89 and 399,881.57

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Solution

The fourth proportional to 658,064.21, 908,189.89 and 399,881.57 is: 551,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,064.21 : 908,189.89 = 399,881.57 : x
  2. Step 2: Convert to fraction form
    658,064.21/908,189.89 = 399,881.57/x
  3. Step 3: Cross multiply
    658,064.21x = 908,189.89 × 399,881.57
  4. Step 4: Simplify right side
    658,064.21x = 363,168,393,530.67
  5. Step 5: Solve for x
    x = 363,168,393,530.67/658,064.21
  6. Step 6: Final answer
    x = 551,873.80

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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.