Home / 528,719.49-729,638.42-287,004.15

Finding the Fourth Proportional to 528,719.49, 729,638.42 and 287,004.15

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Solution

The fourth proportional to 528,719.49, 729,638.42 and 287,004.15 is: 396,068.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,719.49 : 729,638.42 = 287,004.15 : x
  2. Step 2: Convert to fraction form
    528,719.49/729,638.42 = 287,004.15/x
  3. Step 3: Cross multiply
    528,719.49x = 729,638.42 × 287,004.15
  4. Step 4: Simplify right side
    528,719.49x = 209,409,253,104.42
  5. Step 5: Solve for x
    x = 209,409,253,104.42/528,719.49
  6. Step 6: Final answer
    x = 396,068.72

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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.