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Finding the Fourth Proportional to 514,688.88, 772,008.60 and 140,712.72

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Solution

The fourth proportional to 514,688.88, 772,008.60 and 140,712.72 is: 211,062.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,688.88 : 772,008.60 = 140,712.72 : x
  2. Step 2: Convert to fraction form
    514,688.88/772,008.60 = 140,712.72/x
  3. Step 3: Cross multiply
    514,688.88x = 772,008.60 × 140,712.72
  4. Step 4: Simplify right side
    514,688.88x = 108,631,429,969.39
  5. Step 5: Solve for x
    x = 108,631,429,969.39/514,688.88
  6. Step 6: Final answer
    x = 211,062.32

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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.