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Finding the Fourth Proportional to 520,079.57, 717,695.92 and 290,638.64

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Solution

The fourth proportional to 520,079.57, 717,695.92 and 290,638.64 is: 401,073.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,079.57 : 717,695.92 = 290,638.64 : x
  2. Step 2: Convert to fraction form
    520,079.57/717,695.92 = 290,638.64/x
  3. Step 3: Cross multiply
    520,079.57x = 717,695.92 × 290,638.64
  4. Step 4: Simplify right side
    520,079.57x = 208,590,166,122.35
  5. Step 5: Solve for x
    x = 208,590,166,122.35/520,079.57
  6. Step 6: Final answer
    x = 401,073.57

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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.