Home / 812,140.54-1,120,756.51-439,603.42

Finding the Fourth Proportional to 812,140.54, 1,120,756.51 and 439,603.42

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Solution

The fourth proportional to 812,140.54, 1,120,756.51 and 439,603.42 is: 606,654.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,140.54 : 1,120,756.51 = 439,603.42 : x
  2. Step 2: Convert to fraction form
    812,140.54/1,120,756.51 = 439,603.42/x
  3. Step 3: Cross multiply
    812,140.54x = 1,120,756.51 × 439,603.42
  4. Step 4: Simplify right side
    812,140.54x = 492,688,394,783.26
  5. Step 5: Solve for x
    x = 492,688,394,783.26/812,140.54
  6. Step 6: Final answer
    x = 606,654.11

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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.