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Finding the Fourth Proportional to 727,503.63, 1,003,955.19 and 421,757.22

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Solution

The fourth proportional to 727,503.63, 1,003,955.19 and 421,757.22 is: 582,025.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,503.63 : 1,003,955.19 = 421,757.22 : x
  2. Step 2: Convert to fraction form
    727,503.63/1,003,955.19 = 421,757.22/x
  3. Step 3: Cross multiply
    727,503.63x = 1,003,955.19 × 421,757.22
  4. Step 4: Simplify right side
    727,503.63x = 423,425,349,938.97
  5. Step 5: Solve for x
    x = 423,425,349,938.97/727,503.63
  6. Step 6: Final answer
    x = 582,025.07

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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.