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Finding the Fourth Proportional to 708,877.10, 978,308.69 and 403,049.86

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Solution

The fourth proportional to 708,877.10, 978,308.69 and 403,049.86 is: 556,241.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,877.10 : 978,308.69 = 403,049.86 : x
  2. Step 2: Convert to fraction form
    708,877.10/978,308.69 = 403,049.86/x
  3. Step 3: Cross multiply
    708,877.10x = 978,308.69 × 403,049.86
  4. Step 4: Simplify right side
    708,877.10x = 394,307,176,080.26
  5. Step 5: Solve for x
    x = 394,307,176,080.26/708,877.10
  6. Step 6: Final answer
    x = 556,241.94

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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.