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Finding the Fourth Proportional to 520,130.32, 717,771.36 and 290,690.80

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Solution

The fourth proportional to 520,130.32, 717,771.36 and 290,690.80 is: 401,148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,130.32 : 717,771.36 = 290,690.80 : x
  2. Step 2: Convert to fraction form
    520,130.32/717,771.36 = 290,690.80/x
  3. Step 3: Cross multiply
    520,130.32x = 717,771.36 × 290,690.80
  4. Step 4: Simplify right side
    520,130.32x = 208,649,530,855.49
  5. Step 5: Solve for x
    x = 208,649,530,855.49/520,130.32
  6. Step 6: Final answer
    x = 401,148.56

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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.