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Finding the Fourth Proportional to 309,599.19, 427,293.57 and 188,810.55

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Solution

The fourth proportional to 309,599.19, 427,293.57 and 188,810.55 is: 260,587.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,599.19 : 427,293.57 = 188,810.55 : x
  2. Step 2: Convert to fraction form
    309,599.19/427,293.57 = 188,810.55/x
  3. Step 3: Cross multiply
    309,599.19x = 427,293.57 × 188,810.55
  4. Step 4: Simplify right side
    309,599.19x = 80,677,533,963.16
  5. Step 5: Solve for x
    x = 80,677,533,963.16/309,599.19
  6. Step 6: Final answer
    x = 260,587.03

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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.