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Finding the Fourth Proportional to 696,635.28, 961,367.22 and 390,779.46

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Solution

The fourth proportional to 696,635.28, 961,367.22 and 390,779.46 is: 539,281.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,635.28 : 961,367.22 = 390,779.46 : x
  2. Step 2: Convert to fraction form
    696,635.28/961,367.22 = 390,779.46/x
  3. Step 3: Cross multiply
    696,635.28x = 961,367.22 × 390,779.46
  4. Step 4: Simplify right side
    696,635.28x = 375,682,563,093.30
  5. Step 5: Solve for x
    x = 375,682,563,093.30/696,635.28
  6. Step 6: Final answer
    x = 539,281.56

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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.