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Finding the Fourth Proportional to 399,389,430.40, 599,084,145.60 and 354,039,798.40

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Solution

The fourth proportional to 399,389,430.40, 599,084,145.60 and 354,039,798.40 is: 531,059,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,389,430.40 : 599,084,145.60 = 354,039,798.40 : x
  2. Step 2: Convert to fraction form
    399,389,430.40/599,084,145.60 = 354,039,798.40/x
  3. Step 3: Cross multiply
    399,389,430.40x = 599,084,145.60 × 354,039,798.40
  4. Step 4: Simplify right side
    399,389,430.40x = 212,099,630,132,860,256
  5. Step 5: Solve for x
    x = 212,099,630,132,860,256/399,389,430.40
  6. Step 6: Final answer
    x = 531,059,697.60

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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.