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Finding the Fourth Proportional to 571,360.22, 786,681.68 and 485,137.74

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Solution

The fourth proportional to 571,360.22, 786,681.68 and 485,137.74 is: 667,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,360.22 : 786,681.68 = 485,137.74 : x
  2. Step 2: Convert to fraction form
    571,360.22/786,681.68 = 485,137.74/x
  3. Step 3: Cross multiply
    571,360.22x = 786,681.68 × 485,137.74
  4. Step 4: Simplify right side
    571,360.22x = 381,648,972,334.60
  5. Step 5: Solve for x
    x = 381,648,972,334.60/571,360.22
  6. Step 6: Final answer
    x = 667,965.60

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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.