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Finding the Fourth Proportional to 717,894,951.95, 990,693,075.53 and 400,355,542.73

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Solution

The fourth proportional to 717,894,951.95, 990,693,075.53 and 400,355,542.73 is: 552,489,556.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,894,951.95 : 990,693,075.53 = 400,355,542.73 : x
  2. Step 2: Convert to fraction form
    717,894,951.95/990,693,075.53 = 400,355,542.73/x
  3. Step 3: Cross multiply
    717,894,951.95x = 990,693,075.53 × 400,355,542.73
  4. Step 4: Simplify right side
    717,894,951.95x = 396,629,463,925,710,784
  5. Step 5: Solve for x
    x = 396,629,463,925,710,784/717,894,951.95
  6. Step 6: Final answer
    x = 552,489,556.93

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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.