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Finding the Fourth Proportional to 961,607.60, 1,440,661.80 and 783,148.40

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Solution

The fourth proportional to 961,607.60, 1,440,661.80 and 783,148.40 is: 1,173,297.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    961,607.60 : 1,440,661.80 = 783,148.40 : x
  2. Step 2: Convert to fraction form
    961,607.60/1,440,661.80 = 783,148.40/x
  3. Step 3: Cross multiply
    961,607.60x = 1,440,661.80 × 783,148.40
  4. Step 4: Simplify right side
    961,607.60x = 1,128,251,983,611.12
  5. Step 5: Solve for x
    x = 1,128,251,983,611.12/961,607.60
  6. Step 6: Final answer
    x = 1,173,297.70

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