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Finding the Fourth Proportional to 620,775.60, 856,606.50 and 348,800.28

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Solution

The fourth proportional to 620,775.60, 856,606.50 and 348,800.28 is: 481,308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,775.60 : 856,606.50 = 348,800.28 : x
  2. Step 2: Convert to fraction form
    620,775.60/856,606.50 = 348,800.28/x
  3. Step 3: Cross multiply
    620,775.60x = 856,606.50 × 348,800.28
  4. Step 4: Simplify right side
    620,775.60x = 298,784,587,049.82
  5. Step 5: Solve for x
    x = 298,784,587,049.82/620,775.60
  6. Step 6: Final answer
    x = 481,308.52

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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.