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Finding the Fourth Proportional to 690,155.76, 952,391.56 and 388,291.44

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Solution

The fourth proportional to 690,155.76, 952,391.56 and 388,291.44 is: 535,829.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,155.76 : 952,391.56 = 388,291.44 : x
  2. Step 2: Convert to fraction form
    690,155.76/952,391.56 = 388,291.44/x
  3. Step 3: Cross multiply
    690,155.76x = 952,391.56 × 388,291.44
  4. Step 4: Simplify right side
    690,155.76x = 369,805,490,276.25
  5. Step 5: Solve for x
    x = 369,805,490,276.25/690,155.76
  6. Step 6: Final answer
    x = 535,829.03

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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.