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Finding the Fourth Proportional to 315,361.62, 435,200.58 and 172,125

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Solution

The fourth proportional to 315,361.62, 435,200.58 and 172,125 is: 237,533.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,361.62 : 435,200.58 = 172,125 : x
  2. Step 2: Convert to fraction form
    315,361.62/435,200.58 = 172,125/x
  3. Step 3: Cross multiply
    315,361.62x = 435,200.58 × 172,125
  4. Step 4: Simplify right side
    315,361.62x = 74,908,899,832.50
  5. Step 5: Solve for x
    x = 74,908,899,832.50/315,361.62
  6. Step 6: Final answer
    x = 237,533.34

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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.