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Finding the Fourth Proportional to 708,757.48, 978,049.89 and 402,793.45

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Solution

The fourth proportional to 708,757.48, 978,049.89 and 402,793.45 is: 555,834.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,757.48 : 978,049.89 = 402,793.45 : x
  2. Step 2: Convert to fraction form
    708,757.48/978,049.89 = 402,793.45/x
  3. Step 3: Cross multiply
    708,757.48x = 978,049.89 × 402,793.45
  4. Step 4: Simplify right side
    708,757.48x = 393,952,089,465.22
  5. Step 5: Solve for x
    x = 393,952,089,465.22/708,757.48
  6. Step 6: Final answer
    x = 555,834.82

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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.