Home / 890,919.72-1,228,924.86-528,100.74

Finding the Fourth Proportional to 890,919.72, 1,228,924.86 and 528,100.74

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Solution

The fourth proportional to 890,919.72, 1,228,924.86 and 528,100.74 is: 728,456.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,919.72 : 1,228,924.86 = 528,100.74 : x
  2. Step 2: Convert to fraction form
    890,919.72/1,228,924.86 = 528,100.74/x
  3. Step 3: Cross multiply
    890,919.72x = 1,228,924.86 × 528,100.74
  4. Step 4: Simplify right side
    890,919.72x = 648,996,127,970.40
  5. Step 5: Solve for x
    x = 648,996,127,970.40/890,919.72
  6. Step 6: Final answer
    x = 728,456.35

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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.