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Finding the Fourth Proportional to 1,258,642.56, 1,736,971.38 and 714,763.20

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Solution

The fourth proportional to 1,258,642.56, 1,736,971.38 and 714,763.20 is: 986,398.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,642.56 : 1,736,971.38 = 714,763.20 : x
  2. Step 2: Convert to fraction form
    1,258,642.56/1,736,971.38 = 714,763.20/x
  3. Step 3: Cross multiply
    1,258,642.56x = 1,736,971.38 × 714,763.20
  4. Step 4: Simplify right side
    1,258,642.56x = 1,241,523,221,877.22
  5. Step 5: Solve for x
    x = 1,241,523,221,877.22/1,258,642.56
  6. Step 6: Final answer
    x = 986,398.57

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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.