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Finding the Fourth Proportional to 780,200, 1,076,371.20 and 453,458.72

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Solution

The fourth proportional to 780,200, 1,076,371.20 and 453,458.72 is: 625,595.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,200 : 1,076,371.20 = 453,458.72 : x
  2. Step 2: Convert to fraction form
    780,200/1,076,371.20 = 453,458.72/x
  3. Step 3: Cross multiply
    780,200x = 1,076,371.20 × 453,458.72
  4. Step 4: Simplify right side
    780,200x = 488,089,906,596.86
  5. Step 5: Solve for x
    x = 488,089,906,596.86/780,200
  6. Step 6: Final answer
    x = 625,595.88

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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.