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Finding the Fourth Proportional to 551,422.68, 823,398.78 and 437,828.28

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Solution

The fourth proportional to 551,422.68, 823,398.78 and 437,828.28 is: 653,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,422.68 : 823,398.78 = 437,828.28 : x
  2. Step 2: Convert to fraction form
    551,422.68/823,398.78 = 437,828.28/x
  3. Step 3: Cross multiply
    551,422.68x = 823,398.78 × 437,828.28
  4. Step 4: Simplify right side
    551,422.68x = 360,507,271,601.50
  5. Step 5: Solve for x
    x = 360,507,271,601.50/551,422.68
  6. Step 6: Final answer
    x = 653,776.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.