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Finding the Fourth Proportional to 642,199.76, 886,242.76 and 355,724.24

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Solution

The fourth proportional to 642,199.76, 886,242.76 and 355,724.24 is: 490,903.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,199.76 : 886,242.76 = 355,724.24 : x
  2. Step 2: Convert to fraction form
    642,199.76/886,242.76 = 355,724.24/x
  3. Step 3: Cross multiply
    642,199.76x = 886,242.76 × 355,724.24
  4. Step 4: Simplify right side
    642,199.76x = 315,258,032,256.50
  5. Step 5: Solve for x
    x = 315,258,032,256.50/642,199.76
  6. Step 6: Final answer
    x = 490,903.38

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.