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Finding the Fourth Proportional to 611,312.39, 915,775.72 and 400,310.63

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Solution

The fourth proportional to 611,312.39, 915,775.72 and 400,310.63 is: 599,684.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,312.39 : 915,775.72 = 400,310.63 : x
  2. Step 2: Convert to fraction form
    611,312.39/915,775.72 = 400,310.63/x
  3. Step 3: Cross multiply
    611,312.39x = 915,775.72 × 400,310.63
  4. Step 4: Simplify right side
    611,312.39x = 366,594,748,831.47
  5. Step 5: Solve for x
    x = 366,594,748,831.47/611,312.39
  6. Step 6: Final answer
    x = 599,684.81

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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.