Home / 3,128,255.40-4,692,383.10-1,330,687.20

Finding the Fourth Proportional to 3,128,255.40, 4,692,383.10 and 1,330,687.20

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Solution

The fourth proportional to 3,128,255.40, 4,692,383.10 and 1,330,687.20 is: 1,996,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128,255.40 : 4,692,383.10 = 1,330,687.20 : x
  2. Step 2: Convert to fraction form
    3,128,255.40/4,692,383.10 = 1,330,687.20/x
  3. Step 3: Cross multiply
    3,128,255.40x = 4,692,383.10 × 1,330,687.20
  4. Step 4: Simplify right side
    3,128,255.40x = 6,244,094,128,666.32
  5. Step 5: Solve for x
    x = 6,244,094,128,666.32/3,128,255.40
  6. Step 6: Final answer
    x = 1,996,030.80

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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.