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Finding the Fourth Proportional to 611,322.39, 915,790.71 and 400,320.63

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Solution

The fourth proportional to 611,322.39, 915,790.71 and 400,320.63 is: 599,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,322.39 : 915,790.71 = 400,320.63 : x
  2. Step 2: Convert to fraction form
    611,322.39/915,790.71 = 400,320.63/x
  3. Step 3: Cross multiply
    611,322.39x = 915,790.71 × 400,320.63
  4. Step 4: Simplify right side
    611,322.39x = 366,609,913,975.35
  5. Step 5: Solve for x
    x = 366,609,913,975.35/611,322.39
  6. Step 6: Final answer
    x = 599,699.80

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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.