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Finding the Fourth Proportional to 315,509.73, 435,421.08 and 172,283.10

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Solution

The fourth proportional to 315,509.73, 435,421.08 and 172,283.10 is: 237,760.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,509.73 : 435,421.08 = 172,283.10 : x
  2. Step 2: Convert to fraction form
    315,509.73/435,421.08 = 172,283.10/x
  3. Step 3: Cross multiply
    315,509.73x = 435,421.08 × 172,283.10
  4. Step 4: Simplify right side
    315,509.73x = 75,015,693,467.75
  5. Step 5: Solve for x
    x = 75,015,693,467.75/315,509.73
  6. Step 6: Final answer
    x = 237,760.32

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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.