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Finding the Fourth Proportional to 456,657.80, 640,720.60 and 456,657.80

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Solution

The fourth proportional to 456,657.80, 640,720.60 and 456,657.80 is: 640,720.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,657.80 : 640,720.60 = 456,657.80 : x
  2. Step 2: Convert to fraction form
    456,657.80/640,720.60 = 456,657.80/x
  3. Step 3: Cross multiply
    456,657.80x = 640,720.60 × 456,657.80
  4. Step 4: Simplify right side
    456,657.80x = 292,590,059,610.68
  5. Step 5: Solve for x
    x = 292,590,059,610.68/456,657.80
  6. Step 6: Final answer
    x = 640,720.60

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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.