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Finding the Fourth Proportional to 570,471.39, 787,220.55 and 312,298.88

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Solution

The fourth proportional to 570,471.39, 787,220.55 and 312,298.88 is: 430,956.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,471.39 : 787,220.55 = 312,298.88 : x
  2. Step 2: Convert to fraction form
    570,471.39/787,220.55 = 312,298.88/x
  3. Step 3: Cross multiply
    570,471.39x = 787,220.55 × 312,298.88
  4. Step 4: Simplify right side
    570,471.39x = 245,848,092,141.88
  5. Step 5: Solve for x
    x = 245,848,092,141.88/570,471.39
  6. Step 6: Final answer
    x = 430,956.04

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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.