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Finding the Fourth Proportional to 528,615.61, 729,492.24 and 310,811.97

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Solution

The fourth proportional to 528,615.61, 729,492.24 and 310,811.97 is: 428,922.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,615.61 : 729,492.24 = 310,811.97 : x
  2. Step 2: Convert to fraction form
    528,615.61/729,492.24 = 310,811.97/x
  3. Step 3: Cross multiply
    528,615.61x = 729,492.24 × 310,811.97
  4. Step 4: Simplify right side
    528,615.61x = 226,734,920,214.11
  5. Step 5: Solve for x
    x = 226,734,920,214.11/528,615.61
  6. Step 6: Final answer
    x = 428,922.11

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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.