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Finding the Fourth Proportional to 528,367.72, 729,148.84 and 286,650.28

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Solution

The fourth proportional to 528,367.72, 729,148.84 and 286,650.28 is: 395,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,367.72 : 729,148.84 = 286,650.28 : x
  2. Step 2: Convert to fraction form
    528,367.72/729,148.84 = 286,650.28/x
  3. Step 3: Cross multiply
    528,367.72x = 729,148.84 × 286,650.28
  4. Step 4: Simplify right side
    528,367.72x = 209,010,721,669.14
  5. Step 5: Solve for x
    x = 209,010,721,669.14/528,367.72
  6. Step 6: Final answer
    x = 395,578.15

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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.