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Finding the Fourth Proportional to 917,003.40, 1,372,880.70 and 812,027.40

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Solution

The fourth proportional to 917,003.40, 1,372,880.70 and 812,027.40 is: 1,215,717.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,003.40 : 1,372,880.70 = 812,027.40 : x
  2. Step 2: Convert to fraction form
    917,003.40/1,372,880.70 = 812,027.40/x
  3. Step 3: Cross multiply
    917,003.40x = 1,372,880.70 × 812,027.40
  4. Step 4: Simplify right side
    917,003.40x = 1,114,816,745,331.18
  5. Step 5: Solve for x
    x = 1,114,816,745,331.18/917,003.40
  6. Step 6: Final answer
    x = 1,215,717.13

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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.