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Finding the Fourth Proportional to 768,238.56, 1,059,569.64 and 492,622.70

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Solution

The fourth proportional to 768,238.56, 1,059,569.64 and 492,622.70 is: 679,434.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,238.56 : 1,059,569.64 = 492,622.70 : x
  2. Step 2: Convert to fraction form
    768,238.56/1,059,569.64 = 492,622.70/x
  3. Step 3: Cross multiply
    768,238.56x = 1,059,569.64 × 492,622.70
  4. Step 4: Simplify right side
    768,238.56x = 521,968,051,596.98
  5. Step 5: Solve for x
    x = 521,968,051,596.98/768,238.56
  6. Step 6: Final answer
    x = 679,434.85

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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.