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Finding the Fourth Proportional to 570,471.25, 787,220.39 and 312,298.70

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Solution

The fourth proportional to 570,471.25, 787,220.39 and 312,298.70 is: 430,955.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,471.25 : 787,220.39 = 312,298.70 : x
  2. Step 2: Convert to fraction form
    570,471.25/787,220.39 = 312,298.70/x
  3. Step 3: Cross multiply
    570,471.25x = 787,220.39 × 312,298.70
  4. Step 4: Simplify right side
    570,471.25x = 245,847,904,410.49
  5. Step 5: Solve for x
    x = 245,847,904,410.49/570,471.25
  6. Step 6: Final answer
    x = 430,955.82

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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.