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Finding the Fourth Proportional to 320,286.54, 440,720.55 and 310,547.10

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Solution

The fourth proportional to 320,286.54, 440,720.55 and 310,547.10 is: 427,318.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,286.54 : 440,720.55 = 310,547.10 : x
  2. Step 2: Convert to fraction form
    320,286.54/440,720.55 = 310,547.10/x
  3. Step 3: Cross multiply
    320,286.54x = 440,720.55 × 310,547.10
  4. Step 4: Simplify right side
    320,286.54x = 136,864,488,712.91
  5. Step 5: Solve for x
    x = 136,864,488,712.91/320,286.54
  6. Step 6: Final answer
    x = 427,318.89

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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.