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Finding the Fourth Proportional to 393,730.68, 590,690.07 and 127,491.51

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Solution

The fourth proportional to 393,730.68, 590,690.07 and 127,491.51 is: 191,267.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,730.68 : 590,690.07 = 127,491.51 : x
  2. Step 2: Convert to fraction form
    393,730.68/590,690.07 = 127,491.51/x
  3. Step 3: Cross multiply
    393,730.68x = 590,690.07 × 127,491.51
  4. Step 4: Simplify right side
    393,730.68x = 75,307,968,966.31
  5. Step 5: Solve for x
    x = 75,307,968,966.31/393,730.68
  6. Step 6: Final answer
    x = 191,267.72

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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.