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Finding the Fourth Proportional to 813,055, 1,122,015.90 and 455,359

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Solution

The fourth proportional to 813,055, 1,122,015.90 and 455,359 is: 628,395.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,055 : 1,122,015.90 = 455,359 : x
  2. Step 2: Convert to fraction form
    813,055/1,122,015.90 = 455,359/x
  3. Step 3: Cross multiply
    813,055x = 1,122,015.90 × 455,359
  4. Step 4: Simplify right side
    813,055x = 510,920,038,208.10
  5. Step 5: Solve for x
    x = 510,920,038,208.10/813,055
  6. Step 6: Final answer
    x = 628,395.42

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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.