Home / 387,078,421.40-580,617,632.10-328,627,784.60

Finding the Fourth Proportional to 387,078,421.40, 580,617,632.10 and 328,627,784.60

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Solution

The fourth proportional to 387,078,421.40, 580,617,632.10 and 328,627,784.60 is: 492,941,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,078,421.40 : 580,617,632.10 = 328,627,784.60 : x
  2. Step 2: Convert to fraction form
    387,078,421.40/580,617,632.10 = 328,627,784.60/x
  3. Step 3: Cross multiply
    387,078,421.40x = 580,617,632.10 × 328,627,784.60
  4. Step 4: Simplify right side
    387,078,421.40x = 190,807,086,136,720,864
  5. Step 5: Solve for x
    x = 190,807,086,136,720,864/387,078,421.40
  6. Step 6: Final answer
    x = 492,941,676.90

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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.