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Finding the Fourth Proportional to 636,925.90, 879,350.46 and 438,357.28

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Solution

The fourth proportional to 636,925.90, 879,350.46 and 438,357.28 is: 605,203.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,925.90 : 879,350.46 = 438,357.28 : x
  2. Step 2: Convert to fraction form
    636,925.90/879,350.46 = 438,357.28/x
  3. Step 3: Cross multiply
    636,925.90x = 879,350.46 × 438,357.28
  4. Step 4: Simplify right side
    636,925.90x = 385,469,675,812.35
  5. Step 5: Solve for x
    x = 385,469,675,812.35/636,925.90
  6. Step 6: Final answer
    x = 605,203.33

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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.