Home / 1,218,390.77-1,681,379.65-667,141.40

Finding the Fourth Proportional to 1,218,390.77, 1,681,379.65 and 667,141.40

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Solution

The fourth proportional to 1,218,390.77, 1,681,379.65 and 667,141.40 is: 920,655.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,390.77 : 1,681,379.65 = 667,141.40 : x
  2. Step 2: Convert to fraction form
    1,218,390.77/1,681,379.65 = 667,141.40/x
  3. Step 3: Cross multiply
    1,218,390.77x = 1,681,379.65 × 667,141.40
  4. Step 4: Simplify right side
    1,218,390.77x = 1,121,717,980,255.46
  5. Step 5: Solve for x
    x = 1,121,717,980,255.46/1,218,390.77
  6. Step 6: Final answer
    x = 920,655.35

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Double scale
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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.