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Finding the Fourth Proportional to 478,642.86, 660,531.51 and 263,790.72

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Solution

The fourth proportional to 478,642.86, 660,531.51 and 263,790.72 is: 364,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,642.86 : 660,531.51 = 263,790.72 : x
  2. Step 2: Convert to fraction form
    478,642.86/660,531.51 = 263,790.72/x
  3. Step 3: Cross multiply
    478,642.86x = 660,531.51 × 263,790.72
  4. Step 4: Simplify right side
    478,642.86x = 174,242,082,605.59
  5. Step 5: Solve for x
    x = 174,242,082,605.59/478,642.86
  6. Step 6: Final answer
    x = 364,033.60

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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.