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Finding the Fourth Proportional to 708,802,899.16, 978,148,026.48 and 391,263,227.52

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Solution

The fourth proportional to 708,802,899.16, 978,148,026.48 and 391,263,227.52 is: 539,943,268.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,802,899.16 : 978,148,026.48 = 391,263,227.52 : x
  2. Step 2: Convert to fraction form
    708,802,899.16/978,148,026.48 = 391,263,227.52/x
  3. Step 3: Cross multiply
    708,802,899.16x = 978,148,026.48 × 391,263,227.52
  4. Step 4: Simplify right side
    708,802,899.16x = 382,713,353,832,883,200
  5. Step 5: Solve for x
    x = 382,713,353,832,883,200/708,802,899.16
  6. Step 6: Final answer
    x = 539,943,268.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.