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Finding the Fourth Proportional to 570,471.72, 787,219.66 and 312,298.68

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Solution

The fourth proportional to 570,471.72, 787,219.66 and 312,298.68 is: 430,955.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,471.72 : 787,219.66 = 312,298.68 : x
  2. Step 2: Convert to fraction form
    570,471.72/787,219.66 = 312,298.68/x
  3. Step 3: Cross multiply
    570,471.72x = 787,219.66 × 312,298.68
  4. Step 4: Simplify right side
    570,471.72x = 245,847,660,688.05
  5. Step 5: Solve for x
    x = 245,847,660,688.05/570,471.72
  6. Step 6: Final answer
    x = 430,955.04

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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.