Home / 812,884.05-1,119,220.67-690,133.64

Finding the Fourth Proportional to 812,884.05, 1,119,220.67 and 690,133.64

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Solution

The fourth proportional to 812,884.05, 1,119,220.67 and 690,133.64 is: 950,211.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,884.05 : 1,119,220.67 = 690,133.64 : x
  2. Step 2: Convert to fraction form
    812,884.05/1,119,220.67 = 690,133.64/x
  3. Step 3: Cross multiply
    812,884.05x = 1,119,220.67 × 690,133.64
  4. Step 4: Simplify right side
    812,884.05x = 772,411,831,079.57
  5. Step 5: Solve for x
    x = 772,411,831,079.57/812,884.05
  6. Step 6: Final answer
    x = 950,211.57

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1.5x scale

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.