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Finding the Fourth Proportional to 708,799,339.08, 978,143,268.33 and 391,259,762.19

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Solution

The fourth proportional to 708,799,339.08, 978,143,268.33 and 391,259,762.19 is: 539,938,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,799,339.08 : 978,143,268.33 = 391,259,762.19 : x
  2. Step 2: Convert to fraction form
    708,799,339.08/978,143,268.33 = 391,259,762.19/x
  3. Step 3: Cross multiply
    708,799,339.08x = 978,143,268.33 × 391,259,762.19
  4. Step 4: Simplify right side
    708,799,339.08x = 382,708,102,554,545,152
  5. Step 5: Solve for x
    x = 382,708,102,554,545,152/708,799,339.08
  6. Step 6: Final answer
    x = 539,938,571.40

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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.