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Finding the Fourth Proportional to 518,347.78, 779,893.35 and 308,143.06

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Solution

The fourth proportional to 518,347.78, 779,893.35 and 308,143.06 is: 463,624.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,347.78 : 779,893.35 = 308,143.06 : x
  2. Step 2: Convert to fraction form
    518,347.78/779,893.35 = 308,143.06/x
  3. Step 3: Cross multiply
    518,347.78x = 779,893.35 × 308,143.06
  4. Step 4: Simplify right side
    518,347.78x = 240,318,723,342.65
  5. Step 5: Solve for x
    x = 240,318,723,342.65/518,347.78
  6. Step 6: Final answer
    x = 463,624.49

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1.5x scale

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.