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Finding the Fourth Proportional to 370,853.20, 556,279.80 and 221,262.40

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Solution

The fourth proportional to 370,853.20, 556,279.80 and 221,262.40 is: 331,893.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,853.20 : 556,279.80 = 221,262.40 : x
  2. Step 2: Convert to fraction form
    370,853.20/556,279.80 = 221,262.40/x
  3. Step 3: Cross multiply
    370,853.20x = 556,279.80 × 221,262.40
  4. Step 4: Simplify right side
    370,853.20x = 123,083,803,619.52
  5. Step 5: Solve for x
    x = 123,083,803,619.52/370,853.20
  6. Step 6: Final answer
    x = 331,893.60

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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.