Home / 686,756.72-1,029,938.04-207,031.28

Finding the Fourth Proportional to 686,756.72, 1,029,938.04 and 207,031.28

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Solution

The fourth proportional to 686,756.72, 1,029,938.04 and 207,031.28 is: 310,487.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,756.72 : 1,029,938.04 = 207,031.28 : x
  2. Step 2: Convert to fraction form
    686,756.72/1,029,938.04 = 207,031.28/x
  3. Step 3: Cross multiply
    686,756.72x = 1,029,938.04 × 207,031.28
  4. Step 4: Simplify right side
    686,756.72x = 213,229,390,741.89
  5. Step 5: Solve for x
    x = 213,229,390,741.89/686,756.72
  6. Step 6: Final answer
    x = 310,487.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.