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Finding the Fourth Proportional to 315,653.28, 435,596.80 and 172,410.40

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Solution

The fourth proportional to 315,653.28, 435,596.80 and 172,410.40 is: 237,923.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,653.28 : 435,596.80 = 172,410.40 : x
  2. Step 2: Convert to fraction form
    315,653.28/435,596.80 = 172,410.40/x
  3. Step 3: Cross multiply
    315,653.28x = 435,596.80 × 172,410.40
  4. Step 4: Simplify right side
    315,653.28x = 75,101,418,526.72
  5. Step 5: Solve for x
    x = 75,101,418,526.72/315,653.28
  6. Step 6: Final answer
    x = 237,923.77

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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.