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Finding the Fourth Proportional to 1,243,831.32, 1,865,740.62 and 485,749.77

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Solution

The fourth proportional to 1,243,831.32, 1,865,740.62 and 485,749.77 is: 728,622.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,831.32 : 1,865,740.62 = 485,749.77 : x
  2. Step 2: Convert to fraction form
    1,243,831.32/1,865,740.62 = 485,749.77/x
  3. Step 3: Cross multiply
    1,243,831.32x = 1,865,740.62 × 485,749.77
  4. Step 4: Simplify right side
    1,243,831.32x = 906,283,077,044.66
  5. Step 5: Solve for x
    x = 906,283,077,044.66/1,243,831.32
  6. Step 6: Final answer
    x = 728,622.17

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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.