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Finding the Fourth Proportional to 645,407.10, 968,110.65 and 620,912.70

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Solution

The fourth proportional to 645,407.10, 968,110.65 and 620,912.70 is: 931,369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,407.10 : 968,110.65 = 620,912.70 : x
  2. Step 2: Convert to fraction form
    645,407.10/968,110.65 = 620,912.70/x
  3. Step 3: Cross multiply
    645,407.10x = 968,110.65 × 620,912.70
  4. Step 4: Simplify right side
    645,407.10x = 601,112,197,590.26
  5. Step 5: Solve for x
    x = 601,112,197,590.26/645,407.10
  6. Step 6: Final answer
    x = 931,369.05

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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.