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Finding the Fourth Proportional to 529,357.19, 730,511.33 and 287,640.50

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Solution

The fourth proportional to 529,357.19, 730,511.33 and 287,640.50 is: 396,943.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,357.19 : 730,511.33 = 287,640.50 : x
  2. Step 2: Convert to fraction form
    529,357.19/730,511.33 = 287,640.50/x
  3. Step 3: Cross multiply
    529,357.19x = 730,511.33 × 287,640.50
  4. Step 4: Simplify right side
    529,357.19x = 210,124,639,126.11
  5. Step 5: Solve for x
    x = 210,124,639,126.11/529,357.19
  6. Step 6: Final answer
    x = 396,943.02

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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.