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Finding the Fourth Proportional to 520,615.51, 718,444.40 and 291,170.05

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Solution

The fourth proportional to 520,615.51, 718,444.40 and 291,170.05 is: 401,811.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,615.51 : 718,444.40 = 291,170.05 : x
  2. Step 2: Convert to fraction form
    520,615.51/718,444.40 = 291,170.05/x
  3. Step 3: Cross multiply
    520,615.51x = 718,444.40 × 291,170.05
  4. Step 4: Simplify right side
    520,615.51x = 209,189,488,618.26
  5. Step 5: Solve for x
    x = 209,189,488,618.26/520,615.51
  6. Step 6: Final answer
    x = 401,811.87

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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.