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Finding the Fourth Proportional to 1,428,697.63, 1,971,459.16 and 855,723.07

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Solution

The fourth proportional to 1,428,697.63, 1,971,459.16 and 855,723.07 is: 1,180,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,697.63 : 1,971,459.16 = 855,723.07 : x
  2. Step 2: Convert to fraction form
    1,428,697.63/1,971,459.16 = 855,723.07/x
  3. Step 3: Cross multiply
    1,428,697.63x = 1,971,459.16 × 855,723.07
  4. Step 4: Simplify right side
    1,428,697.63x = 1,687,023,084,774.82
  5. Step 5: Solve for x
    x = 1,687,023,084,774.82/1,428,697.63
  6. Step 6: Final answer
    x = 1,180,811.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.