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Finding the Fourth Proportional to 529,485.76, 730,695.20 and 287,768.98

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Solution

The fourth proportional to 529,485.76, 730,695.20 and 287,768.98 is: 397,123.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,485.76 : 730,695.20 = 287,768.98 : x
  2. Step 2: Convert to fraction form
    529,485.76/730,695.20 = 287,768.98/x
  3. Step 3: Cross multiply
    529,485.76x = 730,695.20 × 287,768.98
  4. Step 4: Simplify right side
    529,485.76x = 210,271,412,394.90
  5. Step 5: Solve for x
    x = 210,271,412,394.90/529,485.76
  6. Step 6: Final answer
    x = 397,123.83

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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.