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Finding the Fourth Proportional to 646,782.12, 892,606.50 and 374,920.20

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Solution

The fourth proportional to 646,782.12, 892,606.50 and 374,920.20 is: 517,417.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,782.12 : 892,606.50 = 374,920.20 : x
  2. Step 2: Convert to fraction form
    646,782.12/892,606.50 = 374,920.20/x
  3. Step 3: Cross multiply
    646,782.12x = 892,606.50 × 374,920.20
  4. Step 4: Simplify right side
    646,782.12x = 334,656,207,501.30
  5. Step 5: Solve for x
    x = 334,656,207,501.30/646,782.12
  6. Step 6: Final answer
    x = 517,417.22

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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.