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Finding the Fourth Proportional to 696,694.59, 961,476.57 and 390,867.84

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Solution

The fourth proportional to 696,694.59, 961,476.57 and 390,867.84 is: 539,418.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,694.59 : 961,476.57 = 390,867.84 : x
  2. Step 2: Convert to fraction form
    696,694.59/961,476.57 = 390,867.84/x
  3. Step 3: Cross multiply
    696,694.59x = 961,476.57 × 390,867.84
  4. Step 4: Simplify right side
    696,694.59x = 375,810,270,126.51
  5. Step 5: Solve for x
    x = 375,810,270,126.51/696,694.59
  6. Step 6: Final answer
    x = 539,418.96

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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.