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Finding the Fourth Proportional to 642,254.68, 886,299.60 and 355,768.48

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Solution

The fourth proportional to 642,254.68, 886,299.60 and 355,768.48 is: 490,953.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,254.68 : 886,299.60 = 355,768.48 : x
  2. Step 2: Convert to fraction form
    642,254.68/886,299.60 = 355,768.48/x
  3. Step 3: Cross multiply
    642,254.68x = 886,299.60 × 355,768.48
  4. Step 4: Simplify right side
    642,254.68x = 315,317,461,516.61
  5. Step 5: Solve for x
    x = 315,317,461,516.61/642,254.68
  6. Step 6: Final answer
    x = 490,953.93

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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.