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Finding the Fourth Proportional to 1,369,568.06, 1,890,609.30 and 818,478.24

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Solution

The fourth proportional to 1,369,568.06, 1,890,609.30 and 818,478.24 is: 1,129,861.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,568.06 : 1,890,609.30 = 818,478.24 : x
  2. Step 2: Convert to fraction form
    1,369,568.06/1,890,609.30 = 818,478.24/x
  3. Step 3: Cross multiply
    1,369,568.06x = 1,890,609.30 × 818,478.24
  4. Step 4: Simplify right side
    1,369,568.06x = 1,547,422,572,391.63
  5. Step 5: Solve for x
    x = 1,547,422,572,391.63/1,369,568.06
  6. Step 6: Final answer
    x = 1,129,861.76

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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.