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Finding the Fourth Proportional to 1,319,656,809.60, 1,980,760,672.80 and 665,346,650.40

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Solution

The fourth proportional to 1,319,656,809.60, 1,980,760,672.80 and 665,346,650.40 is: 998,663,038.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,656,809.60 : 1,980,760,672.80 = 665,346,650.40 : x
  2. Step 2: Convert to fraction form
    1,319,656,809.60/1,980,760,672.80 = 665,346,650.40/x
  3. Step 3: Cross multiply
    1,319,656,809.60x = 1,980,760,672.80 × 665,346,650.40
  4. Step 4: Simplify right side
    1,319,656,809.60x = 1,317,892,478,891,530,240
  5. Step 5: Solve for x
    x = 1,317,892,478,891,530,240/1,319,656,809.60
  6. Step 6: Final answer
    x = 998,663,038.23

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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.