Home / 389,039.40-536,920.56-216,985.50

Finding the Fourth Proportional to 389,039.40, 536,920.56 and 216,985.50

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Solution

The fourth proportional to 389,039.40, 536,920.56 and 216,985.50 is: 299,465.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,039.40 : 536,920.56 = 216,985.50 : x
  2. Step 2: Convert to fraction form
    389,039.40/536,920.56 = 216,985.50/x
  3. Step 3: Cross multiply
    389,039.40x = 536,920.56 × 216,985.50
  4. Step 4: Simplify right side
    389,039.40x = 116,503,976,171.88
  5. Step 5: Solve for x
    x = 116,503,976,171.88/389,039.40
  6. Step 6: Final answer
    x = 299,465.75

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1.5x scale

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.