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Finding the Fourth Proportional to 885,810.70, 1,328,716.05 and 353,413.90

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Solution

The fourth proportional to 885,810.70, 1,328,716.05 and 353,413.90 is: 530,120.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,810.70 : 1,328,716.05 = 353,413.90 : x
  2. Step 2: Convert to fraction form
    885,810.70/1,328,716.05 = 353,413.90/x
  3. Step 3: Cross multiply
    885,810.70x = 1,328,716.05 × 353,413.90
  4. Step 4: Simplify right side
    885,810.70x = 469,586,721,223.10
  5. Step 5: Solve for x
    x = 469,586,721,223.10/885,810.70
  6. Step 6: Final answer
    x = 530,120.85

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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.