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Finding the Fourth Proportional to 708,834.95, 978,174.47 and 386,551.25

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Solution

The fourth proportional to 708,834.95, 978,174.47 and 386,551.25 is: 533,431.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,834.95 : 978,174.47 = 386,551.25 : x
  2. Step 2: Convert to fraction form
    708,834.95/978,174.47 = 386,551.25/x
  3. Step 3: Cross multiply
    708,834.95x = 978,174.47 × 386,551.25
  4. Step 4: Simplify right side
    708,834.95x = 378,114,562,163.83
  5. Step 5: Solve for x
    x = 378,114,562,163.83/708,834.95
  6. Step 6: Final answer
    x = 533,431.04

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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.