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Finding the Fourth Proportional to 708,912.34, 978,295.53 and 386,616.58

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Solution

The fourth proportional to 708,912.34, 978,295.53 and 386,616.58 is: 533,528.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,912.34 : 978,295.53 = 386,616.58 : x
  2. Step 2: Convert to fraction form
    708,912.34/978,295.53 = 386,616.58/x
  3. Step 3: Cross multiply
    708,912.34x = 978,295.53 × 386,616.58
  4. Step 4: Simplify right side
    708,912.34x = 378,225,272,037.89
  5. Step 5: Solve for x
    x = 378,225,272,037.89/708,912.34
  6. Step 6: Final answer
    x = 533,528.97

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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.