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Finding the Fourth Proportional to 315,643.73, 435,585.47 and 172,403.73

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Solution

The fourth proportional to 315,643.73, 435,585.47 and 172,403.73 is: 237,915.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,643.73 : 435,585.47 = 172,403.73 : x
  2. Step 2: Convert to fraction form
    315,643.73/435,585.47 = 172,403.73/x
  3. Step 3: Cross multiply
    315,643.73x = 435,585.47 × 172,403.73
  4. Step 4: Simplify right side
    315,643.73x = 75,096,558,899.78
  5. Step 5: Solve for x
    x = 75,096,558,899.78/315,643.73
  6. Step 6: Final answer
    x = 237,915.58

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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.