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Finding the Fourth Proportional to 403,376.80, 605,065.20 and 359,831.20

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Solution

The fourth proportional to 403,376.80, 605,065.20 and 359,831.20 is: 539,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,376.80 : 605,065.20 = 359,831.20 : x
  2. Step 2: Convert to fraction form
    403,376.80/605,065.20 = 359,831.20/x
  3. Step 3: Cross multiply
    403,376.80x = 605,065.20 × 359,831.20
  4. Step 4: Simplify right side
    403,376.80x = 217,721,336,994.24
  5. Step 5: Solve for x
    x = 217,721,336,994.24/403,376.80
  6. Step 6: Final answer
    x = 539,746.80

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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.