Home / 828,129.37-1,142,820.42-465,556.21

Finding the Fourth Proportional to 828,129.37, 1,142,820.42 and 465,556.21

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Solution

The fourth proportional to 828,129.37, 1,142,820.42 and 465,556.21 is: 642,468.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,129.37 : 1,142,820.42 = 465,556.21 : x
  2. Step 2: Convert to fraction form
    828,129.37/1,142,820.42 = 465,556.21/x
  3. Step 3: Cross multiply
    828,129.37x = 1,142,820.42 × 465,556.21
  4. Step 4: Simplify right side
    828,129.37x = 532,047,143,445.81
  5. Step 5: Solve for x
    x = 532,047,143,445.81/828,129.37
  6. Step 6: Final answer
    x = 642,468.63

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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.