Home / 911,036.76-1,257,135.30-528,988.92

Finding the Fourth Proportional to 911,036.76, 1,257,135.30 and 528,988.92

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Solution

The fourth proportional to 911,036.76, 1,257,135.30 and 528,988.92 is: 729,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,036.76 : 1,257,135.30 = 528,988.92 : x
  2. Step 2: Convert to fraction form
    911,036.76/1,257,135.30 = 528,988.92/x
  3. Step 3: Cross multiply
    911,036.76x = 1,257,135.30 × 528,988.92
  4. Step 4: Simplify right side
    911,036.76x = 665,010,644,640.88
  5. Step 5: Solve for x
    x = 665,010,644,640.88/911,036.76
  6. Step 6: Final answer
    x = 729,949.30

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Double scale
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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.