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Finding the Fourth Proportional to 281,279.79, 388,166.58 and 153,963.45

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Solution

The fourth proportional to 281,279.79, 388,166.58 and 153,963.45 is: 212,469.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,279.79 : 388,166.58 = 153,963.45 : x
  2. Step 2: Convert to fraction form
    281,279.79/388,166.58 = 153,963.45/x
  3. Step 3: Cross multiply
    281,279.79x = 388,166.58 × 153,963.45
  4. Step 4: Simplify right side
    281,279.79x = 59,763,465,831.50
  5. Step 5: Solve for x
    x = 59,763,465,831.50/281,279.79
  6. Step 6: Final answer
    x = 212,469.82

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1.5x scale

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.