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Finding the Fourth Proportional to 1,189,902, 1,642,064.80 and 653,358

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Solution

The fourth proportional to 1,189,902, 1,642,064.80 and 653,358 is: 901,634.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,902 : 1,642,064.80 = 653,358 : x
  2. Step 2: Convert to fraction form
    1,189,902/1,642,064.80 = 653,358/x
  3. Step 3: Cross multiply
    1,189,902x = 1,642,064.80 × 653,358
  4. Step 4: Simplify right side
    1,189,902x = 1,072,856,173,598.40
  5. Step 5: Solve for x
    x = 1,072,856,173,598.40/1,189,902
  6. Step 6: Final answer
    x = 901,634.06

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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.