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Finding the Fourth Proportional to 790,472.80, 1,185,709.20 and 347,240.80

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Solution

The fourth proportional to 790,472.80, 1,185,709.20 and 347,240.80 is: 520,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,472.80 : 1,185,709.20 = 347,240.80 : x
  2. Step 2: Convert to fraction form
    790,472.80/1,185,709.20 = 347,240.80/x
  3. Step 3: Cross multiply
    790,472.80x = 1,185,709.20 × 347,240.80
  4. Step 4: Simplify right side
    790,472.80x = 411,726,611,175.36
  5. Step 5: Solve for x
    x = 411,726,611,175.36/790,472.80
  6. Step 6: Final answer
    x = 520,861.20

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Double scale
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Similar ratio
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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.