Home / 712,697.62-983,522.89-390,419.17

Finding the Fourth Proportional to 712,697.62, 983,522.89 and 390,419.17

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Solution

The fourth proportional to 712,697.62, 983,522.89 and 390,419.17 is: 538,778.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,697.62 : 983,522.89 = 390,419.17 : x
  2. Step 2: Convert to fraction form
    712,697.62/983,522.89 = 390,419.17/x
  3. Step 3: Cross multiply
    712,697.62x = 983,522.89 × 390,419.17
  4. Step 4: Simplify right side
    712,697.62x = 383,986,191,755.23
  5. Step 5: Solve for x
    x = 383,986,191,755.23/712,697.62
  6. Step 6: Final answer
    x = 538,778.55

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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.