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Finding the Fourth Proportional to 520,130.87, 717,774.98 and 287,556.81

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Solution

The fourth proportional to 520,130.87, 717,774.98 and 287,556.81 is: 396,825.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,130.87 : 717,774.98 = 287,556.81 : x
  2. Step 2: Convert to fraction form
    520,130.87/717,774.98 = 287,556.81/x
  3. Step 3: Cross multiply
    520,130.87x = 717,774.98 × 287,556.81
  4. Step 4: Simplify right side
    520,130.87x = 206,401,083,546.61
  5. Step 5: Solve for x
    x = 206,401,083,546.61/520,130.87
  6. Step 6: Final answer
    x = 396,825.29

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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.