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Finding the Fourth Proportional to 371,765.90, 513,038.22 and 210,650.78

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Solution

The fourth proportional to 371,765.90, 513,038.22 and 210,650.78 is: 290,698.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,765.90 : 513,038.22 = 210,650.78 : x
  2. Step 2: Convert to fraction form
    371,765.90/513,038.22 = 210,650.78/x
  3. Step 3: Cross multiply
    371,765.90x = 513,038.22 × 210,650.78
  4. Step 4: Simplify right side
    371,765.90x = 108,071,901,212.81
  5. Step 5: Solve for x
    x = 108,071,901,212.81/371,765.90
  6. Step 6: Final answer
    x = 290,698.80

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1.5x scale

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.