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Finding the Fourth Proportional to 889,859.76, 1,228,000.16 and 481,952.20

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Solution

The fourth proportional to 889,859.76, 1,228,000.16 and 481,952.20 is: 665,090.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,859.76 : 1,228,000.16 = 481,952.20 : x
  2. Step 2: Convert to fraction form
    889,859.76/1,228,000.16 = 481,952.20/x
  3. Step 3: Cross multiply
    889,859.76x = 1,228,000.16 × 481,952.20
  4. Step 4: Simplify right side
    889,859.76x = 591,837,378,712.35
  5. Step 5: Solve for x
    x = 591,837,378,712.35/889,859.76
  6. Step 6: Final answer
    x = 665,090.62

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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.