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Finding the Fourth Proportional to 421,283.70, 631,925.55 and 185,087.70

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Solution

The fourth proportional to 421,283.70, 631,925.55 and 185,087.70 is: 277,631.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,283.70 : 631,925.55 = 185,087.70 : x
  2. Step 2: Convert to fraction form
    421,283.70/631,925.55 = 185,087.70/x
  3. Step 3: Cross multiply
    421,283.70x = 631,925.55 × 185,087.70
  4. Step 4: Simplify right side
    421,283.70x = 116,961,646,620.74
  5. Step 5: Solve for x
    x = 116,961,646,620.74/421,283.70
  6. Step 6: Final answer
    x = 277,631.55

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Similar ratio
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1.5x scale

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.