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Finding the Fourth Proportional to 402,347.31, 555,008.35 and 251,181.87

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Solution

The fourth proportional to 402,347.31, 555,008.35 and 251,181.87 is: 346,486.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,347.31 : 555,008.35 = 251,181.87 : x
  2. Step 2: Convert to fraction form
    402,347.31/555,008.35 = 251,181.87/x
  3. Step 3: Cross multiply
    402,347.31x = 555,008.35 × 251,181.87
  4. Step 4: Simplify right side
    402,347.31x = 139,408,035,218.62
  5. Step 5: Solve for x
    x = 139,408,035,218.62/402,347.31
  6. Step 6: Final answer
    x = 346,486.81

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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.