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Finding the Fourth Proportional to 869,152.10, 1,303,728.15 and 443,999.30

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Solution

The fourth proportional to 869,152.10, 1,303,728.15 and 443,999.30 is: 665,998.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,152.10 : 1,303,728.15 = 443,999.30 : x
  2. Step 2: Convert to fraction form
    869,152.10/1,303,728.15 = 443,999.30/x
  3. Step 3: Cross multiply
    869,152.10x = 1,303,728.15 × 443,999.30
  4. Step 4: Simplify right side
    869,152.10x = 578,854,385,990.30
  5. Step 5: Solve for x
    x = 578,854,385,990.30/869,152.10
  6. Step 6: Final answer
    x = 665,998.95

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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.