Home / 690,949.45-953,497.60-389,143.45

Finding the Fourth Proportional to 690,949.45, 953,497.60 and 389,143.45

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Solution

The fourth proportional to 690,949.45, 953,497.60 and 389,143.45 is: 537,010.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,949.45 : 953,497.60 = 389,143.45 : x
  2. Step 2: Convert to fraction form
    690,949.45/953,497.60 = 389,143.45/x
  3. Step 3: Cross multiply
    690,949.45x = 953,497.60 × 389,143.45
  4. Step 4: Simplify right side
    690,949.45x = 371,047,345,630.72
  5. Step 5: Solve for x
    x = 371,047,345,630.72/690,949.45
  6. Step 6: Final answer
    x = 537,010.84

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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.