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Finding the Fourth Proportional to 708,831.01, 978,165.21 and 402,940.81

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Solution

The fourth proportional to 708,831.01, 978,165.21 and 402,940.81 is: 556,046.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,831.01 : 978,165.21 = 402,940.81 : x
  2. Step 2: Convert to fraction form
    708,831.01/978,165.21 = 402,940.81/x
  3. Step 3: Cross multiply
    708,831.01x = 978,165.21 × 402,940.81
  4. Step 4: Simplify right side
    708,831.01x = 394,142,682,031.22
  5. Step 5: Solve for x
    x = 394,142,682,031.22/708,831.01
  6. Step 6: Final answer
    x = 556,046.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.