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Finding the Fourth Proportional to 315,143.13, 434,900.30 and 171,903.81

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Solution

The fourth proportional to 315,143.13, 434,900.30 and 171,903.81 is: 237,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,143.13 : 434,900.30 = 171,903.81 : x
  2. Step 2: Convert to fraction form
    315,143.13/434,900.30 = 171,903.81/x
  3. Step 3: Cross multiply
    315,143.13x = 434,900.30 × 171,903.81
  4. Step 4: Simplify right side
    315,143.13x = 74,761,017,680.62
  5. Step 5: Solve for x
    x = 74,761,017,680.62/315,143.13
  6. Step 6: Final answer
    x = 237,228.77

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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.