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Finding the Fourth Proportional to 315,434.26, 435,300.06 and 172,194.40

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Solution

The fourth proportional to 315,434.26, 435,300.06 and 172,194.40 is: 237,628.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,434.26 : 435,300.06 = 172,194.40 : x
  2. Step 2: Convert to fraction form
    315,434.26/435,300.06 = 172,194.40/x
  3. Step 3: Cross multiply
    315,434.26x = 435,300.06 × 172,194.40
  4. Step 4: Simplify right side
    315,434.26x = 74,956,232,651.66
  5. Step 5: Solve for x
    x = 74,956,232,651.66/315,434.26
  6. Step 6: Final answer
    x = 237,628.70

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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.