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Finding the Fourth Proportional to 1,212,928.56, 1,673,985.96 and 703,648.08

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Solution

The fourth proportional to 1,212,928.56, 1,673,985.96 and 703,648.08 is: 971,118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,928.56 : 1,673,985.96 = 703,648.08 : x
  2. Step 2: Convert to fraction form
    1,212,928.56/1,673,985.96 = 703,648.08/x
  3. Step 3: Cross multiply
    1,212,928.56x = 1,673,985.96 × 703,648.08
  4. Step 4: Simplify right side
    1,212,928.56x = 1,177,897,006,700.96
  5. Step 5: Solve for x
    x = 1,177,897,006,700.96/1,212,928.56
  6. Step 6: Final answer
    x = 971,118.21

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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.