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Finding the Fourth Proportional to 1,266,640.64, 1,747,966.72 and 685,870.08

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Solution

The fourth proportional to 1,266,640.64, 1,747,966.72 and 685,870.08 is: 946,502.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266,640.64 : 1,747,966.72 = 685,870.08 : x
  2. Step 2: Convert to fraction form
    1,266,640.64/1,747,966.72 = 685,870.08/x
  3. Step 3: Cross multiply
    1,266,640.64x = 1,747,966.72 × 685,870.08
  4. Step 4: Simplify right side
    1,266,640.64x = 1,198,878,074,083.74
  5. Step 5: Solve for x
    x = 1,198,878,074,083.74/1,266,640.64
  6. Step 6: Final answer
    x = 946,502.14

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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.