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Finding the Fourth Proportional to 255,649.39, 382,916.39 and 210,772.15

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Solution

The fourth proportional to 255,649.39, 382,916.39 and 210,772.15 is: 315,698.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,649.39 : 382,916.39 = 210,772.15 : x
  2. Step 2: Convert to fraction form
    255,649.39/382,916.39 = 210,772.15/x
  3. Step 3: Cross multiply
    255,649.39x = 382,916.39 × 210,772.15
  4. Step 4: Simplify right side
    255,649.39x = 80,708,108,779.39
  5. Step 5: Solve for x
    x = 80,708,108,779.39/255,649.39
  6. Step 6: Final answer
    x = 315,698.42

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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.