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Finding the Fourth Proportional to 2,613,258, 3,919,887 and 840,330

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Solution

The fourth proportional to 2,613,258, 3,919,887 and 840,330 is: 1,260,495

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,613,258 : 3,919,887 = 840,330 : x
  2. Step 2: Convert to fraction form
    2,613,258/3,919,887 = 840,330/x
  3. Step 3: Cross multiply
    2,613,258x = 3,919,887 × 840,330
  4. Step 4: Simplify right side
    2,613,258x = 3,293,998,642,710
  5. Step 5: Solve for x
    x = 3,293,998,642,710/2,613,258
  6. Step 6: Final answer
    x = 1,260,495

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.