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Finding the Fourth Proportional to 570,440.81, 787,217.60 and 312,313.46

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Solution

The fourth proportional to 570,440.81, 787,217.60 and 312,313.46 is: 430,997.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,440.81 : 787,217.60 = 312,313.46 : x
  2. Step 2: Convert to fraction form
    570,440.81/787,217.60 = 312,313.46/x
  3. Step 3: Cross multiply
    570,440.81x = 787,217.60 × 312,313.46
  4. Step 4: Simplify right side
    570,440.81x = 245,858,649,273.59
  5. Step 5: Solve for x
    x = 245,858,649,273.59/570,440.81
  6. Step 6: Final answer
    x = 430,997.65

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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.