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Finding the Fourth Proportional to 426,700.30, 640,048.14 and 173,979.81

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Solution

The fourth proportional to 426,700.30, 640,048.14 and 173,979.81 is: 260,968.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,700.30 : 640,048.14 = 173,979.81 : x
  2. Step 2: Convert to fraction form
    426,700.30/640,048.14 = 173,979.81/x
  3. Step 3: Cross multiply
    426,700.30x = 640,048.14 × 173,979.81
  4. Step 4: Simplify right side
    426,700.30x = 111,355,453,788.05
  5. Step 5: Solve for x
    x = 111,355,453,788.05/426,700.30
  6. Step 6: Final answer
    x = 260,968.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.