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Finding the Fourth Proportional to 648,361.80, 971,303.40 and 348,742.80

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Solution

The fourth proportional to 648,361.80, 971,303.40 and 348,742.80 is: 522,447.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,361.80 : 971,303.40 = 348,742.80 : x
  2. Step 2: Convert to fraction form
    648,361.80/971,303.40 = 348,742.80/x
  3. Step 3: Cross multiply
    648,361.80x = 971,303.40 × 348,742.80
  4. Step 4: Simplify right side
    648,361.80x = 338,735,067,365.52
  5. Step 5: Solve for x
    x = 338,735,067,365.52/648,361.80
  6. Step 6: Final answer
    x = 522,447.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.