Home / 389,988.28-585,031.64-133,870.76

Finding the Fourth Proportional to 389,988.28, 585,031.64 and 133,870.76

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Solution

The fourth proportional to 389,988.28, 585,031.64 and 133,870.76 is: 200,823.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,988.28 : 585,031.64 = 133,870.76 : x
  2. Step 2: Convert to fraction form
    389,988.28/585,031.64 = 133,870.76/x
  3. Step 3: Cross multiply
    389,988.28x = 585,031.64 × 133,870.76
  4. Step 4: Simplify right side
    389,988.28x = 78,318,628,870.20
  5. Step 5: Solve for x
    x = 78,318,628,870.20/389,988.28
  6. Step 6: Final answer
    x = 200,823.03

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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.