Home / 905,780.88-1,358,428.32-431,522.64

Finding the Fourth Proportional to 905,780.88, 1,358,428.32 and 431,522.64

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Solution

The fourth proportional to 905,780.88, 1,358,428.32 and 431,522.64 is: 647,168.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,780.88 : 1,358,428.32 = 431,522.64 : x
  2. Step 2: Convert to fraction form
    905,780.88/1,358,428.32 = 431,522.64/x
  3. Step 3: Cross multiply
    905,780.88x = 1,358,428.32 × 431,522.64
  4. Step 4: Simplify right side
    905,780.88x = 586,192,574,897.17
  5. Step 5: Solve for x
    x = 586,192,574,897.17/905,780.88
  6. Step 6: Final answer
    x = 647,168.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.