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Finding the Fourth Proportional to 887,642, 1,224,946 and 485,234

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Solution

The fourth proportional to 887,642, 1,224,946 and 485,234 is: 669,622.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,642 : 1,224,946 = 485,234 : x
  2. Step 2: Convert to fraction form
    887,642/1,224,946 = 485,234/x
  3. Step 3: Cross multiply
    887,642x = 1,224,946 × 485,234
  4. Step 4: Simplify right side
    887,642x = 594,385,447,364
  5. Step 5: Solve for x
    x = 594,385,447,364/887,642
  6. Step 6: Final answer
    x = 669,622.94

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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.