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Finding the Fourth Proportional to 645,765.56, 968,638.62 and 290,528.72

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Solution

The fourth proportional to 645,765.56, 968,638.62 and 290,528.72 is: 435,788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,765.56 : 968,638.62 = 290,528.72 : x
  2. Step 2: Convert to fraction form
    645,765.56/968,638.62 = 290,528.72/x
  3. Step 3: Cross multiply
    645,765.56x = 968,638.62 × 290,528.72
  4. Step 4: Simplify right side
    645,765.56x = 281,417,338,411.17
  5. Step 5: Solve for x
    x = 281,417,338,411.17/645,765.56
  6. Step 6: Final answer
    x = 435,788.71

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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.