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Finding the Fourth Proportional to 645,779.56, 968,659.60 and 290,542.72

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Solution

The fourth proportional to 645,779.56, 968,659.60 and 290,542.72 is: 435,809.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,779.56 : 968,659.60 = 290,542.72 : x
  2. Step 2: Convert to fraction form
    645,779.56/968,659.60 = 290,542.72/x
  3. Step 3: Cross multiply
    645,779.56x = 968,659.60 × 290,542.72
  4. Step 4: Simplify right side
    645,779.56x = 281,436,994,938.11
  5. Step 5: Solve for x
    x = 281,436,994,938.11/645,779.56
  6. Step 6: Final answer
    x = 435,809.70

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1.5x scale

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.