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Finding the Fourth Proportional to 520,227.08, 717,989.60 and 305,484.72

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Solution

The fourth proportional to 520,227.08, 717,989.60 and 305,484.72 is: 421,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,227.08 : 717,989.60 = 305,484.72 : x
  2. Step 2: Convert to fraction form
    520,227.08/717,989.60 = 305,484.72/x
  3. Step 3: Cross multiply
    520,227.08x = 717,989.60 × 305,484.72
  4. Step 4: Simplify right side
    520,227.08x = 219,334,851,918.91
  5. Step 5: Solve for x
    x = 219,334,851,918.91/520,227.08
  6. Step 6: Final answer
    x = 421,613.68

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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.