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Finding the Fourth Proportional to 315,717.39, 435,698.55 and 188,466.80

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Solution

The fourth proportional to 315,717.39, 435,698.55 and 188,466.80 is: 260,089.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,717.39 : 435,698.55 = 188,466.80 : x
  2. Step 2: Convert to fraction form
    315,717.39/435,698.55 = 188,466.80/x
  3. Step 3: Cross multiply
    315,717.39x = 435,698.55 × 188,466.80
  4. Step 4: Simplify right side
    315,717.39x = 82,114,709,304.65
  5. Step 5: Solve for x
    x = 82,114,709,304.65/315,717.39
  6. Step 6: Final answer
    x = 260,089.28

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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.