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Finding the Fourth Proportional to 1,390,321,346.40, 1,951,891,840.80 and 1,390,321,346.40

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Solution

The fourth proportional to 1,390,321,346.40, 1,951,891,840.80 and 1,390,321,346.40 is: 1,951,891,840.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,321,346.40 : 1,951,891,840.80 = 1,390,321,346.40 : x
  2. Step 2: Convert to fraction form
    1,390,321,346.40/1,951,891,840.80 = 1,390,321,346.40/x
  3. Step 3: Cross multiply
    1,390,321,346.40x = 1,951,891,840.80 × 1,390,321,346.40
  4. Step 4: Simplify right side
    1,390,321,346.40x = 2,713,756,892,128,230,400
  5. Step 5: Solve for x
    x = 2,713,756,892,128,230,400/1,390,321,346.40
  6. Step 6: Final answer
    x = 1,951,891,840.80

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1.5x scale

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.