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Finding the Fourth Proportional to 690,551, 952,986.12 and 380,466.20

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Solution

The fourth proportional to 690,551, 952,986.12 and 380,466.20 is: 525,057.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,551 : 952,986.12 = 380,466.20 : x
  2. Step 2: Convert to fraction form
    690,551/952,986.12 = 380,466.20/x
  3. Step 3: Cross multiply
    690,551x = 952,986.12 × 380,466.20
  4. Step 4: Simplify right side
    690,551x = 362,579,007,729.14
  5. Step 5: Solve for x
    x = 362,579,007,729.14/690,551
  6. Step 6: Final answer
    x = 525,057.54

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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.