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Finding the Fourth Proportional to 642,490.20, 963,443.70 and 242,998.20

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Solution

The fourth proportional to 642,490.20, 963,443.70 and 242,998.20 is: 364,387.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,490.20 : 963,443.70 = 242,998.20 : x
  2. Step 2: Convert to fraction form
    642,490.20/963,443.70 = 242,998.20/x
  3. Step 3: Cross multiply
    642,490.20x = 963,443.70 × 242,998.20
  4. Step 4: Simplify right side
    642,490.20x = 234,115,084,901.34
  5. Step 5: Solve for x
    x = 234,115,084,901.34/642,490.20
  6. Step 6: Final answer
    x = 364,387.01

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Double scale
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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.