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Finding the Fourth Proportional to 645,776.93, 891,158.26 and 373,856.33

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Solution

The fourth proportional to 645,776.93, 891,158.26 and 373,856.33 is: 515,913.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,776.93 : 891,158.26 = 373,856.33 : x
  2. Step 2: Convert to fraction form
    645,776.93/891,158.26 = 373,856.33/x
  3. Step 3: Cross multiply
    645,776.93x = 891,158.26 × 373,856.33
  4. Step 4: Simplify right side
    645,776.93x = 333,165,156,532.79
  5. Step 5: Solve for x
    x = 333,165,156,532.79/645,776.93
  6. Step 6: Final answer
    x = 515,913.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.