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Finding the Fourth Proportional to 887,838, 1,225,216.44 and 485,430

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Solution

The fourth proportional to 887,838, 1,225,216.44 and 485,430 is: 669,893.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,838 : 1,225,216.44 = 485,430 : x
  2. Step 2: Convert to fraction form
    887,838/1,225,216.44 = 485,430/x
  3. Step 3: Cross multiply
    887,838x = 1,225,216.44 × 485,430
  4. Step 4: Simplify right side
    887,838x = 594,756,816,469.20
  5. Step 5: Solve for x
    x = 594,756,816,469.20/887,838
  6. Step 6: Final answer
    x = 669,893.40

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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.