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Finding the Fourth Proportional to 518,727.81, 715,842.98 and 289,285.35

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Solution

The fourth proportional to 518,727.81, 715,842.98 and 289,285.35 is: 399,213.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,727.81 : 715,842.98 = 289,285.35 : x
  2. Step 2: Convert to fraction form
    518,727.81/715,842.98 = 289,285.35/x
  3. Step 3: Cross multiply
    518,727.81x = 715,842.98 × 289,285.35
  4. Step 4: Simplify right side
    518,727.81x = 207,082,890,848.09
  5. Step 5: Solve for x
    x = 207,082,890,848.09/518,727.81
  6. Step 6: Final answer
    x = 399,213.01

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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.