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Finding the Fourth Proportional to 478,720.95, 660,636.25 and 263,861.87

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Solution

The fourth proportional to 478,720.95, 660,636.25 and 263,861.87 is: 364,130.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,720.95 : 660,636.25 = 263,861.87 : x
  2. Step 2: Convert to fraction form
    478,720.95/660,636.25 = 263,861.87/x
  3. Step 3: Cross multiply
    478,720.95x = 660,636.25 × 263,861.87
  4. Step 4: Simplify right side
    478,720.95x = 174,316,717,552.25
  5. Step 5: Solve for x
    x = 174,316,717,552.25/478,720.95
  6. Step 6: Final answer
    x = 364,130.12

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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.