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Finding the Fourth Proportional to 478,466.36, 660,379.18 and 274,655.06

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Solution

The fourth proportional to 478,466.36, 660,379.18 and 274,655.06 is: 379,078.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,466.36 : 660,379.18 = 274,655.06 : x
  2. Step 2: Convert to fraction form
    478,466.36/660,379.18 = 274,655.06/x
  3. Step 3: Cross multiply
    478,466.36x = 660,379.18 × 274,655.06
  4. Step 4: Simplify right side
    478,466.36x = 181,376,480,003.76
  5. Step 5: Solve for x
    x = 181,376,480,003.76/478,466.36
  6. Step 6: Final answer
    x = 379,078.86

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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.