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Finding the Fourth Proportional to 528,880.61, 729,867.93 and 287,173.37

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Solution

The fourth proportional to 528,880.61, 729,867.93 and 287,173.37 is: 396,306.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,880.61 : 729,867.93 = 287,173.37 : x
  2. Step 2: Convert to fraction form
    528,880.61/729,867.93 = 287,173.37/x
  3. Step 3: Cross multiply
    528,880.61x = 729,867.93 × 287,173.37
  4. Step 4: Simplify right side
    528,880.61x = 209,598,633,113.02
  5. Step 5: Solve for x
    x = 209,598,633,113.02/528,880.61
  6. Step 6: Final answer
    x = 396,306.14

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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.