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Finding the Fourth Proportional to 916,923.40, 1,372,760.70 and 811,947.40

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Solution

The fourth proportional to 916,923.40, 1,372,760.70 and 811,947.40 is: 1,215,597.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,923.40 : 1,372,760.70 = 811,947.40 : x
  2. Step 2: Convert to fraction form
    916,923.40/1,372,760.70 = 811,947.40/x
  3. Step 3: Cross multiply
    916,923.40x = 1,372,760.70 × 811,947.40
  4. Step 4: Simplify right side
    916,923.40x = 1,114,609,481,187.18
  5. Step 5: Solve for x
    x = 1,114,609,481,187.18/916,923.40
  6. Step 6: Final answer
    x = 1,215,597.16

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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.