Home / 916,966.40-1,372,825.20-811,990.40

Finding the Fourth Proportional to 916,966.40, 1,372,825.20 and 811,990.40

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Solution

The fourth proportional to 916,966.40, 1,372,825.20 and 811,990.40 is: 1,215,661.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,966.40 : 1,372,825.20 = 811,990.40 : x
  2. Step 2: Convert to fraction form
    916,966.40/1,372,825.20 = 811,990.40/x
  3. Step 3: Cross multiply
    916,966.40x = 1,372,825.20 × 811,990.40
  4. Step 4: Simplify right side
    916,966.40x = 1,114,720,883,278.08
  5. Step 5: Solve for x
    x = 1,114,720,883,278.08/916,966.40
  6. Step 6: Final answer
    x = 1,215,661.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.