Home / 696,635.78-961,367.91-390,779.96

Finding the Fourth Proportional to 696,635.78, 961,367.91 and 390,779.96

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Solution

The fourth proportional to 696,635.78, 961,367.91 and 390,779.96 is: 539,282.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,635.78 : 961,367.91 = 390,779.96 : x
  2. Step 2: Convert to fraction form
    696,635.78/961,367.91 = 390,779.96/x
  3. Step 3: Cross multiply
    696,635.78x = 961,367.91 × 390,779.96
  4. Step 4: Simplify right side
    696,635.78x = 375,683,313,415.08
  5. Step 5: Solve for x
    x = 375,683,313,415.08/696,635.78
  6. Step 6: Final answer
    x = 539,282.25

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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.