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Finding the Fourth Proportional to 612,466.80, 918,635.40 and 191,720.40

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Solution

The fourth proportional to 612,466.80, 918,635.40 and 191,720.40 is: 287,560.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,466.80 : 918,635.40 = 191,720.40 : x
  2. Step 2: Convert to fraction form
    612,466.80/918,635.40 = 191,720.40/x
  3. Step 3: Cross multiply
    612,466.80x = 918,635.40 × 191,720.40
  4. Step 4: Simplify right side
    612,466.80x = 176,121,146,342.16
  5. Step 5: Solve for x
    x = 176,121,146,342.16/612,466.80
  6. Step 6: Final answer
    x = 287,560.32

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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.