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Finding the Fourth Proportional to 696,598.68, 961,317 and 390,742.96

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Solution

The fourth proportional to 696,598.68, 961,317 and 390,742.96 is: 539,231.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,598.68 : 961,317 = 390,742.96 : x
  2. Step 2: Convert to fraction form
    696,598.68/961,317 = 390,742.96/x
  3. Step 3: Cross multiply
    696,598.68x = 961,317 × 390,742.96
  4. Step 4: Simplify right side
    696,598.68x = 375,627,850,078.32
  5. Step 5: Solve for x
    x = 375,627,850,078.32/696,598.68
  6. Step 6: Final answer
    x = 539,231.35

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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.