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Finding the Fourth Proportional to 889,188, 1,227,079.50 and 486,780

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Solution

The fourth proportional to 889,188, 1,227,079.50 and 486,780 is: 671,756.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,188 : 1,227,079.50 = 486,780 : x
  2. Step 2: Convert to fraction form
    889,188/1,227,079.50 = 486,780/x
  3. Step 3: Cross multiply
    889,188x = 1,227,079.50 × 486,780
  4. Step 4: Simplify right side
    889,188x = 597,317,759,010
  5. Step 5: Solve for x
    x = 597,317,759,010/889,188
  6. Step 6: Final answer
    x = 671,756.43

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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.