Home / 920,009.90-1,269,600.07-512,111.15

Finding the Fourth Proportional to 920,009.90, 1,269,600.07 and 512,111.15

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Solution

The fourth proportional to 920,009.90, 1,269,600.07 and 512,111.15 is: 706,705.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,009.90 : 1,269,600.07 = 512,111.15 : x
  2. Step 2: Convert to fraction form
    920,009.90/1,269,600.07 = 512,111.15/x
  3. Step 3: Cross multiply
    920,009.90x = 1,269,600.07 × 512,111.15
  4. Step 4: Simplify right side
    920,009.90x = 650,176,351,887.78
  5. Step 5: Solve for x
    x = 650,176,351,887.78/920,009.90
  6. Step 6: Final answer
    x = 706,705.82

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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.