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Finding the Fourth Proportional to 691,970.01, 954,755.91 and 420,031.14

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Solution

The fourth proportional to 691,970.01, 954,755.91 and 420,031.14 is: 579,544.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,970.01 : 954,755.91 = 420,031.14 : x
  2. Step 2: Convert to fraction form
    691,970.01/954,755.91 = 420,031.14/x
  3. Step 3: Cross multiply
    691,970.01x = 954,755.91 × 420,031.14
  4. Step 4: Simplify right side
    691,970.01x = 401,027,213,299.04
  5. Step 5: Solve for x
    x = 401,027,213,299.04/691,970.01
  6. Step 6: Final answer
    x = 579,544.21

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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.