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Finding the Fourth Proportional to 885,718.90, 1,328,906.40 and 286,699.60

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Solution

The fourth proportional to 885,718.90, 1,328,906.40 and 286,699.60 is: 430,155.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,718.90 : 1,328,906.40 = 286,699.60 : x
  2. Step 2: Convert to fraction form
    885,718.90/1,328,906.40 = 286,699.60/x
  3. Step 3: Cross multiply
    885,718.90x = 1,328,906.40 × 286,699.60
  4. Step 4: Simplify right side
    885,718.90x = 380,996,933,317.44
  5. Step 5: Solve for x
    x = 380,996,933,317.44/885,718.90
  6. Step 6: Final answer
    x = 430,155.59

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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.