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Finding the Fourth Proportional to 611,289.10, 915,740.81 and 400,287.34

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Solution

The fourth proportional to 611,289.10, 915,740.81 and 400,287.34 is: 599,649.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,289.10 : 915,740.81 = 400,287.34 : x
  2. Step 2: Convert to fraction form
    611,289.10/915,740.81 = 400,287.34/x
  3. Step 3: Cross multiply
    611,289.10x = 915,740.81 × 400,287.34
  4. Step 4: Simplify right side
    611,289.10x = 366,559,452,964.35
  5. Step 5: Solve for x
    x = 366,559,452,964.35/611,289.10
  6. Step 6: Final answer
    x = 599,649.91

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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.