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Finding the Fourth Proportional to 479,989.20, 719,983.80 and 472,990.80

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Solution

The fourth proportional to 479,989.20, 719,983.80 and 472,990.80 is: 709,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,989.20 : 719,983.80 = 472,990.80 : x
  2. Step 2: Convert to fraction form
    479,989.20/719,983.80 = 472,990.80/x
  3. Step 3: Cross multiply
    479,989.20x = 719,983.80 × 472,990.80
  4. Step 4: Simplify right side
    479,989.20x = 340,545,713,549.04
  5. Step 5: Solve for x
    x = 340,545,713,549.04/479,989.20
  6. Step 6: Final answer
    x = 709,486.20

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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.