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Finding the Fourth Proportional to 528,765.30, 729,696.60 and 287,047.80

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Solution

The fourth proportional to 528,765.30, 729,696.60 and 287,047.80 is: 396,126.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,765.30 : 729,696.60 = 287,047.80 : x
  2. Step 2: Convert to fraction form
    528,765.30/729,696.60 = 287,047.80/x
  3. Step 3: Cross multiply
    528,765.30x = 729,696.60 × 287,047.80
  4. Step 4: Simplify right side
    528,765.30x = 209,457,803,697.48
  5. Step 5: Solve for x
    x = 209,457,803,697.48/528,765.30
  6. Step 6: Final answer
    x = 396,126.23

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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.