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Finding the Fourth Proportional to 486,877.60, 671,878.68 and 272,019.28

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Solution

The fourth proportional to 486,877.60, 671,878.68 and 272,019.28 is: 375,379.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,877.60 : 671,878.68 = 272,019.28 : x
  2. Step 2: Convert to fraction form
    486,877.60/671,878.68 = 272,019.28/x
  3. Step 3: Cross multiply
    486,877.60x = 671,878.68 × 272,019.28
  4. Step 4: Simplify right side
    486,877.60x = 182,763,954,780.95
  5. Step 5: Solve for x
    x = 182,763,954,780.95/486,877.60
  6. Step 6: Final answer
    x = 375,379.67

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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.