Home / 766,084.64-1,148,328.70-428,630.54

Finding the Fourth Proportional to 766,084.64, 1,148,328.70 and 428,630.54

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Solution

The fourth proportional to 766,084.64, 1,148,328.70 and 428,630.54 is: 642,499.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,084.64 : 1,148,328.70 = 428,630.54 : x
  2. Step 2: Convert to fraction form
    766,084.64/1,148,328.70 = 428,630.54/x
  3. Step 3: Cross multiply
    766,084.64x = 1,148,328.70 × 428,630.54
  4. Step 4: Simplify right side
    766,084.64x = 492,208,743,965.28
  5. Step 5: Solve for x
    x = 492,208,743,965.28/766,084.64
  6. Step 6: Final answer
    x = 642,499.17

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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.