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Finding the Fourth Proportional to 708,910.84, 978,293.46 and 386,615.08

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Solution

The fourth proportional to 708,910.84, 978,293.46 and 386,615.08 is: 533,526.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,910.84 : 978,293.46 = 386,615.08 : x
  2. Step 2: Convert to fraction form
    708,910.84/978,293.46 = 386,615.08/x
  3. Step 3: Cross multiply
    708,910.84x = 978,293.46 × 386,615.08
  4. Step 4: Simplify right side
    708,910.84x = 378,223,004,301.38
  5. Step 5: Solve for x
    x = 378,223,004,301.38/708,910.84
  6. Step 6: Final answer
    x = 533,526.90

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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.