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Finding the Fourth Proportional to 559,872,562.20, 839,808,843.30 and 421,920,101.40

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Solution

The fourth proportional to 559,872,562.20, 839,808,843.30 and 421,920,101.40 is: 632,880,152.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,872,562.20 : 839,808,843.30 = 421,920,101.40 : x
  2. Step 2: Convert to fraction form
    559,872,562.20/839,808,843.30 = 421,920,101.40/x
  3. Step 3: Cross multiply
    559,872,562.20x = 839,808,843.30 × 421,920,101.40
  4. Step 4: Simplify right side
    559,872,562.20x = 354,332,232,321,752,640
  5. Step 5: Solve for x
    x = 354,332,232,321,752,640/559,872,562.20
  6. Step 6: Final answer
    x = 632,880,152.10

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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.