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Finding the Fourth Proportional to 680,304.63, 938,609.03 and 385,905.83

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Solution

The fourth proportional to 680,304.63, 938,609.03 and 385,905.83 is: 532,430.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,304.63 : 938,609.03 = 385,905.83 : x
  2. Step 2: Convert to fraction form
    680,304.63/938,609.03 = 385,905.83/x
  3. Step 3: Cross multiply
    680,304.63x = 938,609.03 × 385,905.83
  4. Step 4: Simplify right side
    680,304.63x = 362,214,696,767.65
  5. Step 5: Solve for x
    x = 362,214,696,767.65/680,304.63
  6. Step 6: Final answer
    x = 532,430.15

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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.