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Finding the Fourth Proportional to 1,351,674.88, 1,865,110.60 and 820,970

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Solution

The fourth proportional to 1,351,674.88, 1,865,110.60 and 820,970 is: 1,132,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,674.88 : 1,865,110.60 = 820,970 : x
  2. Step 2: Convert to fraction form
    1,351,674.88/1,865,110.60 = 820,970/x
  3. Step 3: Cross multiply
    1,351,674.88x = 1,865,110.60 × 820,970
  4. Step 4: Simplify right side
    1,351,674.88x = 1,531,199,849,282
  5. Step 5: Solve for x
    x = 1,531,199,849,282/1,351,674.88
  6. Step 6: Final answer
    x = 1,132,816.68

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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.