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Finding the Fourth Proportional to 708,836.45, 978,176.53 and 386,552.75

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Solution

The fourth proportional to 708,836.45, 978,176.53 and 386,552.75 is: 533,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,836.45 : 978,176.53 = 386,552.75 : x
  2. Step 2: Convert to fraction form
    708,836.45/978,176.53 = 386,552.75/x
  3. Step 3: Cross multiply
    708,836.45x = 978,176.53 × 386,552.75
  4. Step 4: Simplify right side
    708,836.45x = 378,116,827,656.96
  5. Step 5: Solve for x
    x = 378,116,827,656.96/708,836.45
  6. Step 6: Final answer
    x = 533,433.10

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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.