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Finding the Fourth Proportional to 570,432.64, 787,206.39 and 312,305.30

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Solution

The fourth proportional to 570,432.64, 787,206.39 and 312,305.30 is: 430,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,432.64 : 787,206.39 = 312,305.30 : x
  2. Step 2: Convert to fraction form
    570,432.64/787,206.39 = 312,305.30/x
  3. Step 3: Cross multiply
    570,432.64x = 787,206.39 × 312,305.30
  4. Step 4: Simplify right side
    570,432.64x = 245,848,727,790.87
  5. Step 5: Solve for x
    x = 245,848,727,790.87/570,432.64
  6. Step 6: Final answer
    x = 430,986.43

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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.