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Finding the Fourth Proportional to 696,871.96, 961,625.22 and 390,905.80

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Solution

The fourth proportional to 696,871.96, 961,625.22 and 390,905.80 is: 539,417.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,871.96 : 961,625.22 = 390,905.80 : x
  2. Step 2: Convert to fraction form
    696,871.96/961,625.22 = 390,905.80/x
  3. Step 3: Cross multiply
    696,871.96x = 961,625.22 × 390,905.80
  4. Step 4: Simplify right side
    696,871.96x = 375,904,875,924.28
  5. Step 5: Solve for x
    x = 375,904,875,924.28/696,871.96
  6. Step 6: Final answer
    x = 539,417.42

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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.