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Finding the Fourth Proportional to 520,658.72, 718,500.48 and 291,221.36

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Solution

The fourth proportional to 520,658.72, 718,500.48 and 291,221.36 is: 401,880.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,658.72 : 718,500.48 = 291,221.36 : x
  2. Step 2: Convert to fraction form
    520,658.72/718,500.48 = 291,221.36/x
  3. Step 3: Cross multiply
    520,658.72x = 718,500.48 × 291,221.36
  4. Step 4: Simplify right side
    520,658.72x = 209,242,686,946.25
  5. Step 5: Solve for x
    x = 209,242,686,946.25/520,658.72
  6. Step 6: Final answer
    x = 401,880.69

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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.