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Finding the Fourth Proportional to 620,063,838.60, 929,432,205.90 and 210,740,728.20

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Solution

The fourth proportional to 620,063,838.60, 929,432,205.90 and 210,740,728.20 is: 315,885,571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,063,838.60 : 929,432,205.90 = 210,740,728.20 : x
  2. Step 2: Convert to fraction form
    620,063,838.60/929,432,205.90 = 210,740,728.20/x
  3. Step 3: Cross multiply
    620,063,838.60x = 929,432,205.90 × 210,740,728.20
  4. Step 4: Simplify right side
    620,063,838.60x = 195,869,219,883,898,336
  5. Step 5: Solve for x
    x = 195,869,219,883,898,336/620,063,838.60
  6. Step 6: Final answer
    x = 315,885,571.28

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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.