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Finding the Fourth Proportional to 340,718.28, 469,934.10 and 320,627.40

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Solution

The fourth proportional to 340,718.28, 469,934.10 and 320,627.40 is: 442,223.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,718.28 : 469,934.10 = 320,627.40 : x
  2. Step 2: Convert to fraction form
    340,718.28/469,934.10 = 320,627.40/x
  3. Step 3: Cross multiply
    340,718.28x = 469,934.10 × 320,627.40
  4. Step 4: Simplify right side
    340,718.28x = 150,673,748,654.34
  5. Step 5: Solve for x
    x = 150,673,748,654.34/340,718.28
  6. Step 6: Final answer
    x = 442,223.85

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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.