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Finding the Fourth Proportional to 557,870.40, 769,802.40 and 331,485.12

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Solution

The fourth proportional to 557,870.40, 769,802.40 and 331,485.12 is: 457,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,870.40 : 769,802.40 = 331,485.12 : x
  2. Step 2: Convert to fraction form
    557,870.40/769,802.40 = 331,485.12/x
  3. Step 3: Cross multiply
    557,870.40x = 769,802.40 × 331,485.12
  4. Step 4: Simplify right side
    557,870.40x = 255,178,040,940.29
  5. Step 5: Solve for x
    x = 255,178,040,940.29/557,870.40
  6. Step 6: Final answer
    x = 457,414.56

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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.