Home / 415,043,999.20-621,894,152.40-261,415,122.40

Finding the Fourth Proportional to 415,043,999.20, 621,894,152.40 and 261,415,122.40

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Solution

The fourth proportional to 415,043,999.20, 621,894,152.40 and 261,415,122.40 is: 391,699,521.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,043,999.20 : 621,894,152.40 = 261,415,122.40 : x
  2. Step 2: Convert to fraction form
    415,043,999.20/621,894,152.40 = 261,415,122.40/x
  3. Step 3: Cross multiply
    415,043,999.20x = 621,894,152.40 × 261,415,122.40
  4. Step 4: Simplify right side
    415,043,999.20x = 162,572,535,969,490,240
  5. Step 5: Solve for x
    x = 162,572,535,969,490,240/415,043,999.20
  6. Step 6: Final answer
    x = 391,699,521.70

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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.