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Finding the Fourth Proportional to 1,211,564,426.65, 1,671,958,978.62 and 654,647,473.71

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Solution

The fourth proportional to 1,211,564,426.65, 1,671,958,978.62 and 654,647,473.71 is: 903,413,551.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,564,426.65 : 1,671,958,978.62 = 654,647,473.71 : x
  2. Step 2: Convert to fraction form
    1,211,564,426.65/1,671,958,978.62 = 654,647,473.71/x
  3. Step 3: Cross multiply
    1,211,564,426.65x = 1,671,958,978.62 × 654,647,473.71
  4. Step 4: Simplify right side
    1,211,564,426.65x = 1,094,543,721,500,334,848
  5. Step 5: Solve for x
    x = 1,094,543,721,500,334,848/1,211,564,426.65
  6. Step 6: Final answer
    x = 903,413,551.46

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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.