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Finding the Fourth Proportional to 518,477.15, 715,501.44 and 289,049

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Solution

The fourth proportional to 518,477.15, 715,501.44 and 289,049 is: 398,889.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,477.15 : 715,501.44 = 289,049 : x
  2. Step 2: Convert to fraction form
    518,477.15/715,501.44 = 289,049/x
  3. Step 3: Cross multiply
    518,477.15x = 715,501.44 × 289,049
  4. Step 4: Simplify right side
    518,477.15x = 206,814,974,285.32
  5. Step 5: Solve for x
    x = 206,814,974,285.32/518,477.15
  6. Step 6: Final answer
    x = 398,889.28

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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.