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Finding the Fourth Proportional to 528,497.56, 729,318.84 and 310,730.78

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Solution

The fourth proportional to 528,497.56, 729,318.84 and 310,730.78 is: 428,803.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,497.56 : 729,318.84 = 310,730.78 : x
  2. Step 2: Convert to fraction form
    528,497.56/729,318.84 = 310,730.78/x
  3. Step 3: Cross multiply
    528,497.56x = 729,318.84 × 310,730.78
  4. Step 4: Simplify right side
    528,497.56x = 226,621,812,679.95
  5. Step 5: Solve for x
    x = 226,621,812,679.95/528,497.56
  6. Step 6: Final answer
    x = 428,803.89

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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.