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Finding the Fourth Proportional to 199,711,973.80, 280,402,979 and 199,711,973.80

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Solution

The fourth proportional to 199,711,973.80, 280,402,979 and 199,711,973.80 is: 280,402,979

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,711,973.80 : 280,402,979 = 199,711,973.80 : x
  2. Step 2: Convert to fraction form
    199,711,973.80/280,402,979 = 199,711,973.80/x
  3. Step 3: Cross multiply
    199,711,973.80x = 280,402,979 × 199,711,973.80
  4. Step 4: Simplify right side
    199,711,973.80x = 55,999,832,395,489,952
  5. Step 5: Solve for x
    x = 55,999,832,395,489,952/199,711,973.80
  6. Step 6: Final answer
    x = 280,402,979

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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.