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Finding the Fourth Proportional to 539,279.40, 809,210.70 and 239,806.20

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Solution

The fourth proportional to 539,279.40, 809,210.70 and 239,806.20 is: 359,838.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,279.40 : 809,210.70 = 239,806.20 : x
  2. Step 2: Convert to fraction form
    539,279.40/809,210.70 = 239,806.20/x
  3. Step 3: Cross multiply
    539,279.40x = 809,210.70 × 239,806.20
  4. Step 4: Simplify right side
    539,279.40x = 194,053,742,966.34
  5. Step 5: Solve for x
    x = 194,053,742,966.34/539,279.40
  6. Step 6: Final answer
    x = 359,838.97

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1.5x scale

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.