Home / 687,066.45-1,030,107.60-287,501.55

Finding the Fourth Proportional to 687,066.45, 1,030,107.60 and 287,501.55

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Solution

The fourth proportional to 687,066.45, 1,030,107.60 and 287,501.55 is: 431,046.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,066.45 : 1,030,107.60 = 287,501.55 : x
  2. Step 2: Convert to fraction form
    687,066.45/1,030,107.60 = 287,501.55/x
  3. Step 3: Cross multiply
    687,066.45x = 1,030,107.60 × 287,501.55
  4. Step 4: Simplify right side
    687,066.45x = 296,157,531,666.78
  5. Step 5: Solve for x
    x = 296,157,531,666.78/687,066.45
  6. Step 6: Final answer
    x = 431,046.42

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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.