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Finding the Fourth Proportional to 805,358.40, 1,208,728.80 and 356,769.60

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Solution

The fourth proportional to 805,358.40, 1,208,728.80 and 356,769.60 is: 535,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,358.40 : 1,208,728.80 = 356,769.60 : x
  2. Step 2: Convert to fraction form
    805,358.40/1,208,728.80 = 356,769.60/x
  3. Step 3: Cross multiply
    805,358.40x = 1,208,728.80 × 356,769.60
  4. Step 4: Simplify right side
    805,358.40x = 431,237,690,484.48
  5. Step 5: Solve for x
    x = 431,237,690,484.48/805,358.40
  6. Step 6: Final answer
    x = 535,460.60

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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.