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Finding the Fourth Proportional to 611,443.60, 917,165.40 and 190,718.80

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Solution

The fourth proportional to 611,443.60, 917,165.40 and 190,718.80 is: 286,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,443.60 : 917,165.40 = 190,718.80 : x
  2. Step 2: Convert to fraction form
    611,443.60/917,165.40 = 190,718.80/x
  3. Step 3: Cross multiply
    611,443.60x = 917,165.40 × 190,718.80
  4. Step 4: Simplify right side
    611,443.60x = 174,920,684,489.52
  5. Step 5: Solve for x
    x = 174,920,684,489.52/611,443.60
  6. Step 6: Final answer
    x = 286,078.20

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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.