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Finding the Fourth Proportional to 529,538.85, 730,763.78 and 287,821.49

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Solution

The fourth proportional to 529,538.85, 730,763.78 and 287,821.49 is: 397,193.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,538.85 : 730,763.78 = 287,821.49 : x
  2. Step 2: Convert to fraction form
    529,538.85/730,763.78 = 287,821.49/x
  3. Step 3: Cross multiply
    529,538.85x = 730,763.78 × 287,821.49
  4. Step 4: Simplify right side
    529,538.85x = 210,329,514,904.71
  5. Step 5: Solve for x
    x = 210,329,514,904.71/529,538.85
  6. Step 6: Final answer
    x = 397,193.74

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1.5x scale

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.