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Finding the Fourth Proportional to 907,878, 1,252,823.67 and 520,673.42

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Solution

The fourth proportional to 907,878, 1,252,823.67 and 520,673.42 is: 718,501.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,878 : 1,252,823.67 = 520,673.42 : x
  2. Step 2: Convert to fraction form
    907,878/1,252,823.67 = 520,673.42/x
  3. Step 3: Cross multiply
    907,878x = 1,252,823.67 × 520,673.42
  4. Step 4: Simplify right side
    907,878x = 652,311,978,651.73
  5. Step 5: Solve for x
    x = 652,311,978,651.73/907,878
  6. Step 6: Final answer
    x = 718,501.80

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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.