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Finding the Fourth Proportional to 439,864.96, 607,078.91 and 278,735.08

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Solution

The fourth proportional to 439,864.96, 607,078.91 and 278,735.08 is: 384,695.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,864.96 : 607,078.91 = 278,735.08 : x
  2. Step 2: Convert to fraction form
    439,864.96/607,078.91 = 278,735.08/x
  3. Step 3: Cross multiply
    439,864.96x = 607,078.91 × 278,735.08
  4. Step 4: Simplify right side
    439,864.96x = 169,214,188,545.16
  5. Step 5: Solve for x
    x = 169,214,188,545.16/439,864.96
  6. Step 6: Final answer
    x = 384,695.77

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1.5x scale

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.