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Finding the Fourth Proportional to 690,087.60, 952,297.56 and 388,223.28

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Solution

The fourth proportional to 690,087.60, 952,297.56 and 388,223.28 is: 535,735.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,087.60 : 952,297.56 = 388,223.28 : x
  2. Step 2: Convert to fraction form
    690,087.60/952,297.56 = 388,223.28/x
  3. Step 3: Cross multiply
    690,087.60x = 952,297.56 × 388,223.28
  4. Step 4: Simplify right side
    690,087.60x = 369,704,082,279.20
  5. Step 5: Solve for x
    x = 369,704,082,279.20/690,087.60
  6. Step 6: Final answer
    x = 535,735.00

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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.