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Finding the Fourth Proportional to 518,773.48, 715,908.67 and 289,345.63

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Solution

The fourth proportional to 518,773.48, 715,908.67 and 289,345.63 is: 399,297.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,773.48 : 715,908.67 = 289,345.63 : x
  2. Step 2: Convert to fraction form
    518,773.48/715,908.67 = 289,345.63/x
  3. Step 3: Cross multiply
    518,773.48x = 715,908.67 × 289,345.63
  4. Step 4: Simplify right side
    518,773.48x = 207,145,040,117.34
  5. Step 5: Solve for x
    x = 207,145,040,117.34/518,773.48
  6. Step 6: Final answer
    x = 399,297.67

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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.