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Finding the Fourth Proportional to 659,990.80, 989,330.10 and 304,384.60

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Solution

The fourth proportional to 659,990.80, 989,330.10 and 304,384.60 is: 456,274.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,990.80 : 989,330.10 = 304,384.60 : x
  2. Step 2: Convert to fraction form
    659,990.80/989,330.10 = 304,384.60/x
  3. Step 3: Cross multiply
    659,990.80x = 989,330.10 × 304,384.60
  4. Step 4: Simplify right side
    659,990.80x = 301,136,846,756.46
  5. Step 5: Solve for x
    x = 301,136,846,756.46/659,990.80
  6. Step 6: Final answer
    x = 456,274.31

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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.