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Finding the Fourth Proportional to 456,739.30, 640,834.70 and 456,739.30

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Solution

The fourth proportional to 456,739.30, 640,834.70 and 456,739.30 is: 640,834.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,739.30 : 640,834.70 = 456,739.30 : x
  2. Step 2: Convert to fraction form
    456,739.30/640,834.70 = 456,739.30/x
  3. Step 3: Cross multiply
    456,739.30x = 640,834.70 × 456,739.30
  4. Step 4: Simplify right side
    456,739.30x = 292,694,392,293.71
  5. Step 5: Solve for x
    x = 292,694,392,293.71/456,739.30
  6. Step 6: Final answer
    x = 640,834.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.