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Finding the Fourth Proportional to 631,983.76, 872,102.28 and 345,446.80

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Solution

The fourth proportional to 631,983.76, 872,102.28 and 345,446.80 is: 476,697.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,983.76 : 872,102.28 = 345,446.80 : x
  2. Step 2: Convert to fraction form
    631,983.76/872,102.28 = 345,446.80/x
  3. Step 3: Cross multiply
    631,983.76x = 872,102.28 × 345,446.80
  4. Step 4: Simplify right side
    631,983.76x = 301,264,941,898.70
  5. Step 5: Solve for x
    x = 301,264,941,898.70/631,983.76
  6. Step 6: Final answer
    x = 476,697.28

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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.