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Finding the Fourth Proportional to 485,136.03, 669,429.63 and 278,393.79

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Solution

The fourth proportional to 485,136.03, 669,429.63 and 278,393.79 is: 384,150.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,136.03 : 669,429.63 = 278,393.79 : x
  2. Step 2: Convert to fraction form
    485,136.03/669,429.63 = 278,393.79/x
  3. Step 3: Cross multiply
    485,136.03x = 669,429.63 × 278,393.79
  4. Step 4: Simplify right side
    485,136.03x = 186,365,054,344.36
  5. Step 5: Solve for x
    x = 186,365,054,344.36/485,136.03
  6. Step 6: Final answer
    x = 384,150.10

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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.