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Finding the Fourth Proportional to 664,712.29, 996,859.29 and 215,328.90

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Solution

The fourth proportional to 664,712.29, 996,859.29 and 215,328.90 is: 322,925.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,712.29 : 996,859.29 = 215,328.90 : x
  2. Step 2: Convert to fraction form
    664,712.29/996,859.29 = 215,328.90/x
  3. Step 3: Cross multiply
    664,712.29x = 996,859.29 × 215,328.90
  4. Step 4: Simplify right side
    664,712.29x = 214,652,609,386.19
  5. Step 5: Solve for x
    x = 214,652,609,386.19/664,712.29
  6. Step 6: Final answer
    x = 322,925.59

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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.