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Finding the Fourth Proportional to 392,495,999.40, 587,468,540.70 and 392,495,999.40

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Solution

The fourth proportional to 392,495,999.40, 587,468,540.70 and 392,495,999.40 is: 587,468,540.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,495,999.40 : 587,468,540.70 = 392,495,999.40 : x
  2. Step 2: Convert to fraction form
    392,495,999.40/587,468,540.70 = 392,495,999.40/x
  3. Step 3: Cross multiply
    392,495,999.40x = 587,468,540.70 × 392,495,999.40
  4. Step 4: Simplify right side
    392,495,999.40x = 230,579,051,998,106,080
  5. Step 5: Solve for x
    x = 230,579,051,998,106,080/392,495,999.40
  6. Step 6: Final answer
    x = 587,468,540.70

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1.5x scale

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.