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Finding the Fourth Proportional to 387,690.71, 581,536.58 and 188,040.51

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Solution

The fourth proportional to 387,690.71, 581,536.58 and 188,040.51 is: 282,061.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,690.71 : 581,536.58 = 188,040.51 : x
  2. Step 2: Convert to fraction form
    387,690.71/581,536.58 = 188,040.51/x
  3. Step 3: Cross multiply
    387,690.71x = 581,536.58 × 188,040.51
  4. Step 4: Simplify right side
    387,690.71x = 109,352,434,146.65
  5. Step 5: Solve for x
    x = 109,352,434,146.65/387,690.71
  6. Step 6: Final answer
    x = 282,061.02

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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.