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Finding the Fourth Proportional to 529,421.98, 730,601.69 and 287,704.00

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Solution

The fourth proportional to 529,421.98, 730,601.69 and 287,704.00 is: 397,031.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,421.98 : 730,601.69 = 287,704.00 : x
  2. Step 2: Convert to fraction form
    529,421.98/730,601.69 = 287,704.00/x
  3. Step 3: Cross multiply
    529,421.98x = 730,601.69 × 287,704.00
  4. Step 4: Simplify right side
    529,421.98x = 210,197,031,165.52
  5. Step 5: Solve for x
    x = 210,197,031,165.52/529,421.98
  6. Step 6: Final answer
    x = 397,031.18

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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.