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Finding the Fourth Proportional to 1,247,798.84, 1,721,963.54 and 674,839.01

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Solution

The fourth proportional to 1,247,798.84, 1,721,963.54 and 674,839.01 is: 931,278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,798.84 : 1,721,963.54 = 674,839.01 : x
  2. Step 2: Convert to fraction form
    1,247,798.84/1,721,963.54 = 674,839.01/x
  3. Step 3: Cross multiply
    1,247,798.84x = 1,721,963.54 × 674,839.01
  4. Step 4: Simplify right side
    1,247,798.84x = 1,162,048,174,683.72
  5. Step 5: Solve for x
    x = 1,162,048,174,683.72/1,247,798.84
  6. Step 6: Final answer
    x = 931,278.45

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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.