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Finding the Fourth Proportional to 714,876.62, 985,983.09 and 485,610.68

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Solution

The fourth proportional to 714,876.62, 985,983.09 and 485,610.68 is: 669,771.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,876.62 : 985,983.09 = 485,610.68 : x
  2. Step 2: Convert to fraction form
    714,876.62/985,983.09 = 485,610.68/x
  3. Step 3: Cross multiply
    714,876.62x = 985,983.09 × 485,610.68
  4. Step 4: Simplify right side
    714,876.62x = 478,803,918,803.40
  5. Step 5: Solve for x
    x = 478,803,918,803.40/714,876.62
  6. Step 6: Final answer
    x = 669,771.41

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1.5x scale

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.