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Finding the Fourth Proportional to 642,087.54, 886,080.42 and 355,607.34

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Solution

The fourth proportional to 642,087.54, 886,080.42 and 355,607.34 is: 490,737.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,087.54 : 886,080.42 = 355,607.34 : x
  2. Step 2: Convert to fraction form
    642,087.54/886,080.42 = 355,607.34/x
  3. Step 3: Cross multiply
    642,087.54x = 886,080.42 × 355,607.34
  4. Step 4: Simplify right side
    642,087.54x = 315,096,701,182.28
  5. Step 5: Solve for x
    x = 315,096,701,182.28/642,087.54
  6. Step 6: Final answer
    x = 490,737.92

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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.