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Finding the Fourth Proportional to 579,661.20, 869,491.80 and 242,643.60

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Solution

The fourth proportional to 579,661.20, 869,491.80 and 242,643.60 is: 363,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,661.20 : 869,491.80 = 242,643.60 : x
  2. Step 2: Convert to fraction form
    579,661.20/869,491.80 = 242,643.60/x
  3. Step 3: Cross multiply
    579,661.20x = 869,491.80 × 242,643.60
  4. Step 4: Simplify right side
    579,661.20x = 210,976,620,522.48
  5. Step 5: Solve for x
    x = 210,976,620,522.48/579,661.20
  6. Step 6: Final answer
    x = 363,965.40

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Double scale
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Similar ratio
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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.