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Finding the Fourth Proportional to 1,528,674.12, 2,109,597.12 and 840,375

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Solution

The fourth proportional to 1,528,674.12, 2,109,597.12 and 840,375 is: 1,159,732.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528,674.12 : 2,109,597.12 = 840,375 : x
  2. Step 2: Convert to fraction form
    1,528,674.12/2,109,597.12 = 840,375/x
  3. Step 3: Cross multiply
    1,528,674.12x = 2,109,597.12 × 840,375
  4. Step 4: Simplify right side
    1,528,674.12x = 1,772,852,679,720
  5. Step 5: Solve for x
    x = 1,772,852,679,720/1,528,674.12
  6. Step 6: Final answer
    x = 1,159,732.25

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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.