Home / 1,391,990.88-1,920,830.16-771,812.64

Finding the Fourth Proportional to 1,391,990.88, 1,920,830.16 and 771,812.64

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Solution

The fourth proportional to 1,391,990.88, 1,920,830.16 and 771,812.64 is: 1,065,036.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,990.88 : 1,920,830.16 = 771,812.64 : x
  2. Step 2: Convert to fraction form
    1,391,990.88/1,920,830.16 = 771,812.64/x
  3. Step 3: Cross multiply
    1,391,990.88x = 1,920,830.16 × 771,812.64
  4. Step 4: Simplify right side
    1,391,990.88x = 1,482,520,996,781.22
  5. Step 5: Solve for x
    x = 1,482,520,996,781.22/1,391,990.88
  6. Step 6: Final answer
    x = 1,065,036.43

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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.