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Finding the Fourth Proportional to 669,978.81, 1,004,402.97 and 290,613.96

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Solution

The fourth proportional to 669,978.81, 1,004,402.97 and 290,613.96 is: 435,675.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,978.81 : 1,004,402.97 = 290,613.96 : x
  2. Step 2: Convert to fraction form
    669,978.81/1,004,402.97 = 290,613.96/x
  3. Step 3: Cross multiply
    669,978.81x = 1,004,402.97 × 290,613.96
  4. Step 4: Simplify right side
    669,978.81x = 291,893,524,547.46
  5. Step 5: Solve for x
    x = 291,893,524,547.46/669,978.81
  6. Step 6: Final answer
    x = 435,675.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.