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Finding the Fourth Proportional to 490,068,740.60, 686,606,420.20 and 490,068,740.60

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Solution

The fourth proportional to 490,068,740.60, 686,606,420.20 and 490,068,740.60 is: 686,606,420.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,068,740.60 : 686,606,420.20 = 490,068,740.60 : x
  2. Step 2: Convert to fraction form
    490,068,740.60/686,606,420.20 = 490,068,740.60/x
  3. Step 3: Cross multiply
    490,068,740.60x = 686,606,420.20 × 490,068,740.60
  4. Step 4: Simplify right side
    490,068,740.60x = 336,484,343,635,288,448
  5. Step 5: Solve for x
    x = 336,484,343,635,288,448/490,068,740.60
  6. Step 6: Final answer
    x = 686,606,420.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.