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Finding the Fourth Proportional to 707,064.50, 975,749.17 and 389,112.50

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Solution

The fourth proportional to 707,064.50, 975,749.17 and 389,112.50 is: 536,975.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,064.50 : 975,749.17 = 389,112.50 : x
  2. Step 2: Convert to fraction form
    707,064.50/975,749.17 = 389,112.50/x
  3. Step 3: Cross multiply
    707,064.50x = 975,749.17 × 389,112.50
  4. Step 4: Simplify right side
    707,064.50x = 379,676,198,911.63
  5. Step 5: Solve for x
    x = 379,676,198,911.63/707,064.50
  6. Step 6: Final answer
    x = 536,975.34

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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.