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Finding the Fourth Proportional to 885,803.20, 1,328,704.80 and 353,406.40

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Solution

The fourth proportional to 885,803.20, 1,328,704.80 and 353,406.40 is: 530,109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,803.20 : 1,328,704.80 = 353,406.40 : x
  2. Step 2: Convert to fraction form
    885,803.20/1,328,704.80 = 353,406.40/x
  3. Step 3: Cross multiply
    885,803.20x = 1,328,704.80 × 353,406.40
  4. Step 4: Simplify right side
    885,803.20x = 469,572,780,030.72
  5. Step 5: Solve for x
    x = 469,572,780,030.72/885,803.20
  6. Step 6: Final answer
    x = 530,109.60

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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.