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Finding the Fourth Proportional to 611,894.58, 918,301.44 and 312,625.50

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Solution

The fourth proportional to 611,894.58, 918,301.44 and 312,625.50 is: 469,173.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,894.58 : 918,301.44 = 312,625.50 : x
  2. Step 2: Convert to fraction form
    611,894.58/918,301.44 = 312,625.50/x
  3. Step 3: Cross multiply
    611,894.58x = 918,301.44 × 312,625.50
  4. Step 4: Simplify right side
    611,894.58x = 287,084,446,830.72
  5. Step 5: Solve for x
    x = 287,084,446,830.72/611,894.58
  6. Step 6: Final answer
    x = 469,173.05

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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.