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Finding the Fourth Proportional to 478,345.17, 717,518.66 and 449,115.92

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Solution

The fourth proportional to 478,345.17, 717,518.66 and 449,115.92 is: 673,674.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,345.17 : 717,518.66 = 449,115.92 : x
  2. Step 2: Convert to fraction form
    478,345.17/717,518.66 = 449,115.92/x
  3. Step 3: Cross multiply
    478,345.17x = 717,518.66 × 449,115.92
  4. Step 4: Simplify right side
    478,345.17x = 322,249,047,269.89
  5. Step 5: Solve for x
    x = 322,249,047,269.89/478,345.17
  6. Step 6: Final answer
    x = 673,674.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.