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Finding the Fourth Proportional to 391,262.58, 539,962.56 and 219,170.34

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Solution

The fourth proportional to 391,262.58, 539,962.56 and 219,170.34 is: 302,466.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,262.58 : 539,962.56 = 219,170.34 : x
  2. Step 2: Convert to fraction form
    391,262.58/539,962.56 = 219,170.34/x
  3. Step 3: Cross multiply
    391,262.58x = 539,962.56 × 219,170.34
  4. Step 4: Simplify right side
    391,262.58x = 118,343,777,862.47
  5. Step 5: Solve for x
    x = 118,343,777,862.47/391,262.58
  6. Step 6: Final answer
    x = 302,466.38

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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.