Home / 645,816,045.87-890,946,571.93-394,931,405.43

Finding the Fourth Proportional to 645,816,045.87, 890,946,571.93 and 394,931,405.43

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Solution

The fourth proportional to 645,816,045.87, 890,946,571.93 and 394,931,405.43 is: 544,834,375.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,816,045.87 : 890,946,571.93 = 394,931,405.43 : x
  2. Step 2: Convert to fraction form
    645,816,045.87/890,946,571.93 = 394,931,405.43/x
  3. Step 3: Cross multiply
    645,816,045.87x = 890,946,571.93 × 394,931,405.43
  4. Step 4: Simplify right side
    645,816,045.87x = 351,862,781,814,368,192
  5. Step 5: Solve for x
    x = 351,862,781,814,368,192/645,816,045.87
  6. Step 6: Final answer
    x = 544,834,375.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.