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Finding the Fourth Proportional to 456,722.80, 640,811.60 and 456,722.80

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Solution

The fourth proportional to 456,722.80, 640,811.60 and 456,722.80 is: 640,811.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,722.80 : 640,811.60 = 456,722.80 : x
  2. Step 2: Convert to fraction form
    456,722.80/640,811.60 = 456,722.80/x
  3. Step 3: Cross multiply
    456,722.80x = 640,811.60 × 456,722.80
  4. Step 4: Simplify right side
    456,722.80x = 292,673,268,224.48
  5. Step 5: Solve for x
    x = 292,673,268,224.48/456,722.80
  6. Step 6: Final answer
    x = 640,811.60

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1.5x scale

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.