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Finding the Fourth Proportional to 528,447.78, 729,657.18 and 324,779.76

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Solution

The fourth proportional to 528,447.78, 729,657.18 and 324,779.76 is: 448,441.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,447.78 : 729,657.18 = 324,779.76 : x
  2. Step 2: Convert to fraction form
    528,447.78/729,657.18 = 324,779.76/x
  3. Step 3: Cross multiply
    528,447.78x = 729,657.18 × 324,779.76
  4. Step 4: Simplify right side
    528,447.78x = 236,977,883,802.68
  5. Step 5: Solve for x
    x = 236,977,883,802.68/528,447.78
  6. Step 6: Final answer
    x = 448,441.44

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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.