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Finding the Fourth Proportional to 628,890.75, 867,884.63 and 342,426.42

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Solution

The fourth proportional to 628,890.75, 867,884.63 and 342,426.42 is: 472,556.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,890.75 : 867,884.63 = 342,426.42 : x
  2. Step 2: Convert to fraction form
    628,890.75/867,884.63 = 342,426.42/x
  3. Step 3: Cross multiply
    628,890.75x = 867,884.63 × 342,426.42
  4. Step 4: Simplify right side
    628,890.75x = 297,186,625,111.79
  5. Step 5: Solve for x
    x = 297,186,625,111.79/628,890.75
  6. Step 6: Final answer
    x = 472,556.84

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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.