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Finding the Fourth Proportional to 402,676.61, 555,697.32 and 218,915.56

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Solution

The fourth proportional to 402,676.61, 555,697.32 and 218,915.56 is: 302,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,676.61 : 555,697.32 = 218,915.56 : x
  2. Step 2: Convert to fraction form
    402,676.61/555,697.32 = 218,915.56/x
  3. Step 3: Cross multiply
    402,676.61x = 555,697.32 × 218,915.56
  4. Step 4: Simplify right side
    402,676.61x = 121,650,788,609.06
  5. Step 5: Solve for x
    x = 121,650,788,609.06/402,676.61
  6. Step 6: Final answer
    x = 302,105.42

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1.5x scale

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.