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Finding the Fourth Proportional to 708,962.92, 978,200.55 and 403,015.12

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Solution

The fourth proportional to 708,962.92, 978,200.55 and 403,015.12 is: 556,065.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,962.92 : 978,200.55 = 403,015.12 : x
  2. Step 2: Convert to fraction form
    708,962.92/978,200.55 = 403,015.12/x
  3. Step 3: Cross multiply
    708,962.92x = 978,200.55 × 403,015.12
  4. Step 4: Simplify right side
    708,962.92x = 394,229,609,596.82
  5. Step 5: Solve for x
    x = 394,229,609,596.82/708,962.92
  6. Step 6: Final answer
    x = 556,065.20

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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.