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Finding the Fourth Proportional to 642,112.56, 886,113.12 and 370,179.16

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Solution

The fourth proportional to 642,112.56, 886,113.12 and 370,179.16 is: 510,845.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,112.56 : 886,113.12 = 370,179.16 : x
  2. Step 2: Convert to fraction form
    642,112.56/886,113.12 = 370,179.16/x
  3. Step 3: Cross multiply
    642,112.56x = 886,113.12 × 370,179.16
  4. Step 4: Simplify right side
    642,112.56x = 328,020,610,426.58
  5. Step 5: Solve for x
    x = 328,020,610,426.58/642,112.56
  6. Step 6: Final answer
    x = 510,845.97

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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.