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Finding the Fourth Proportional to 283,386, 391,066.74 and 156,062.64

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Solution

The fourth proportional to 283,386, 391,066.74 and 156,062.64 is: 215,363.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,386 : 391,066.74 = 156,062.64 : x
  2. Step 2: Convert to fraction form
    283,386/391,066.74 = 156,062.64/x
  3. Step 3: Cross multiply
    283,386x = 391,066.74 × 156,062.64
  4. Step 4: Simplify right side
    283,386x = 61,030,907,860.59
  5. Step 5: Solve for x
    x = 61,030,907,860.59/283,386
  6. Step 6: Final answer
    x = 215,363.17

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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.