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Finding the Fourth Proportional to 805,361.12, 1,111,341.12 and 442,775.60

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Solution

The fourth proportional to 805,361.12, 1,111,341.12 and 442,775.60 is: 610,998.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,361.12 : 1,111,341.12 = 442,775.60 : x
  2. Step 2: Convert to fraction form
    805,361.12/1,111,341.12 = 442,775.60/x
  3. Step 3: Cross multiply
    805,361.12x = 1,111,341.12 × 442,775.60
  4. Step 4: Simplify right side
    805,361.12x = 492,074,731,212.67
  5. Step 5: Solve for x
    x = 492,074,731,212.67/805,361.12
  6. Step 6: Final answer
    x = 610,998.87

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.