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Finding the Fourth Proportional to 660,831.42, 911,983.41 and 374,407.32

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Solution

The fourth proportional to 660,831.42, 911,983.41 and 374,407.32 is: 516,702.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,831.42 : 911,983.41 = 374,407.32 : x
  2. Step 2: Convert to fraction form
    660,831.42/911,983.41 = 374,407.32/x
  3. Step 3: Cross multiply
    660,831.42x = 911,983.41 × 374,407.32
  4. Step 4: Simplify right side
    660,831.42x = 341,453,262,550.53
  5. Step 5: Solve for x
    x = 341,453,262,550.53/660,831.42
  6. Step 6: Final answer
    x = 516,702.52

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Why These Related Problems?

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