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Finding the Fourth Proportional to 478,840.32, 718,271.40 and 141,874.65

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Solution

The fourth proportional to 478,840.32, 718,271.40 and 141,874.65 is: 212,815.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,840.32 : 718,271.40 = 141,874.65 : x
  2. Step 2: Convert to fraction form
    478,840.32/718,271.40 = 141,874.65/x
  3. Step 3: Cross multiply
    478,840.32x = 718,271.40 × 141,874.65
  4. Step 4: Simplify right side
    478,840.32x = 101,904,503,480.01
  5. Step 5: Solve for x
    x = 101,904,503,480.01/478,840.32
  6. Step 6: Final answer
    x = 212,815.21

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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.