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Finding the Fourth Proportional to 1,383,102, 1,908,714.51 and 771,248.79

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Solution

The fourth proportional to 1,383,102, 1,908,714.51 and 771,248.79 is: 1,064,342.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,102 : 1,908,714.51 = 771,248.79 : x
  2. Step 2: Convert to fraction form
    1,383,102/1,908,714.51 = 771,248.79/x
  3. Step 3: Cross multiply
    1,383,102x = 1,908,714.51 × 771,248.79
  4. Step 4: Simplify right side
    1,383,102x = 1,472,093,756,292.94
  5. Step 5: Solve for x
    x = 1,472,093,756,292.94/1,383,102
  6. Step 6: Final answer
    x = 1,064,342.15

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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.