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Finding the Fourth Proportional to 565,911,855.81, 780,950,361.84 and 318,392,619.57

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Solution

The fourth proportional to 565,911,855.81, 780,950,361.84 and 318,392,619.57 is: 439,377,314.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,911,855.81 : 780,950,361.84 = 318,392,619.57 : x
  2. Step 2: Convert to fraction form
    565,911,855.81/780,950,361.84 = 318,392,619.57/x
  3. Step 3: Cross multiply
    565,911,855.81x = 780,950,361.84 × 318,392,619.57
  4. Step 4: Simplify right side
    565,911,855.81x = 248,648,831,460,376,960
  5. Step 5: Solve for x
    x = 248,648,831,460,376,960/565,911,855.81
  6. Step 6: Final answer
    x = 439,377,314.52

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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.