Home / 431,927,125.60-647,890,688.40-398,670,728.80

Finding the Fourth Proportional to 431,927,125.60, 647,890,688.40 and 398,670,728.80

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Solution

The fourth proportional to 431,927,125.60, 647,890,688.40 and 398,670,728.80 is: 598,006,093.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,927,125.60 : 647,890,688.40 = 398,670,728.80 : x
  2. Step 2: Convert to fraction form
    431,927,125.60/647,890,688.40 = 398,670,728.80/x
  3. Step 3: Cross multiply
    431,927,125.60x = 647,890,688.40 × 398,670,728.80
  4. Step 4: Simplify right side
    431,927,125.60x = 258,295,052,927,161,696
  5. Step 5: Solve for x
    x = 258,295,052,927,161,696/431,927,125.60
  6. Step 6: Final answer
    x = 598,006,093.20

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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.