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Finding the Fourth Proportional to 865,356, 1,193,415.57 and 720,641.01

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Solution

The fourth proportional to 865,356, 1,193,415.57 and 720,641.01 is: 993,838.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,356 : 1,193,415.57 = 720,641.01 : x
  2. Step 2: Convert to fraction form
    865,356/1,193,415.57 = 720,641.01/x
  3. Step 3: Cross multiply
    865,356x = 1,193,415.57 × 720,641.01
  4. Step 4: Simplify right side
    865,356x = 860,024,201,714.53
  5. Step 5: Solve for x
    x = 860,024,201,714.53/865,356
  6. Step 6: Final answer
    x = 993,838.61

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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.