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Finding the Fourth Proportional to 611,548,958.40, 858,587,188.80 and 611,548,958.40

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Solution

The fourth proportional to 611,548,958.40, 858,587,188.80 and 611,548,958.40 is: 858,587,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,548,958.40 : 858,587,188.80 = 611,548,958.40 : x
  2. Step 2: Convert to fraction form
    611,548,958.40/858,587,188.80 = 611,548,958.40/x
  3. Step 3: Cross multiply
    611,548,958.40x = 858,587,188.80 × 611,548,958.40
  4. Step 4: Simplify right side
    611,548,958.40x = 525,068,101,006,224,128
  5. Step 5: Solve for x
    x = 525,068,101,006,224,128/611,548,958.40
  6. Step 6: Final answer
    x = 858,587,188.80

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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.