Home / 354,326,840.40-531,490,260.60-198,720,915.60

Finding the Fourth Proportional to 354,326,840.40, 531,490,260.60 and 198,720,915.60

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Solution

The fourth proportional to 354,326,840.40, 531,490,260.60 and 198,720,915.60 is: 298,081,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,326,840.40 : 531,490,260.60 = 198,720,915.60 : x
  2. Step 2: Convert to fraction form
    354,326,840.40/531,490,260.60 = 198,720,915.60/x
  3. Step 3: Cross multiply
    354,326,840.40x = 531,490,260.60 × 198,720,915.60
  4. Step 4: Simplify right side
    354,326,840.40x = 105,618,231,218,914,608
  5. Step 5: Solve for x
    x = 105,618,231,218,914,608/354,326,840.40
  6. Step 6: Final answer
    x = 298,081,373.40

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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.