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Finding the Fourth Proportional to 708,969.92, 978,374.72 and 386,674.24

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Solution

The fourth proportional to 708,969.92, 978,374.72 and 386,674.24 is: 533,608.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,969.92 : 978,374.72 = 386,674.24 : x
  2. Step 2: Convert to fraction form
    708,969.92/978,374.72 = 386,674.24/x
  3. Step 3: Cross multiply
    708,969.92x = 978,374.72 × 386,674.24
  4. Step 4: Simplify right side
    708,969.92x = 378,312,301,291.21
  5. Step 5: Solve for x
    x = 378,312,301,291.21/708,969.92
  6. Step 6: Final answer
    x = 533,608.40

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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.