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Finding the Fourth Proportional to 709,021.42, 978,928.66 and 545,387.34

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Solution

The fourth proportional to 709,021.42, 978,928.66 and 545,387.34 is: 753,003.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,021.42 : 978,928.66 = 545,387.34 : x
  2. Step 2: Convert to fraction form
    709,021.42/978,928.66 = 545,387.34/x
  3. Step 3: Cross multiply
    709,021.42x = 978,928.66 × 545,387.34
  4. Step 4: Simplify right side
    709,021.42x = 533,895,297,927.16
  5. Step 5: Solve for x
    x = 533,895,297,927.16/709,021.42
  6. Step 6: Final answer
    x = 753,003.06

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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.