Home / 645,919.85-891,129.28-644,923.39

Finding the Fourth Proportional to 645,919.85, 891,129.28 and 644,923.39

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Solution

The fourth proportional to 645,919.85, 891,129.28 and 644,923.39 is: 889,754.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,919.85 : 891,129.28 = 644,923.39 : x
  2. Step 2: Convert to fraction form
    645,919.85/891,129.28 = 644,923.39/x
  3. Step 3: Cross multiply
    645,919.85x = 891,129.28 × 644,923.39
  4. Step 4: Simplify right side
    645,919.85x = 574,710,115,189.07
  5. Step 5: Solve for x
    x = 574,710,115,189.07/645,919.85
  6. Step 6: Final answer
    x = 889,754.54

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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.