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Finding the Fourth Proportional to 379,617.80, 569,645.40 and 143,130.20

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Solution

The fourth proportional to 379,617.80, 569,645.40 and 143,130.20 is: 214,777.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,617.80 : 569,645.40 = 143,130.20 : x
  2. Step 2: Convert to fraction form
    379,617.80/569,645.40 = 143,130.20/x
  3. Step 3: Cross multiply
    379,617.80x = 569,645.40 × 143,130.20
  4. Step 4: Simplify right side
    379,617.80x = 81,533,460,031.08
  5. Step 5: Solve for x
    x = 81,533,460,031.08/379,617.80
  6. Step 6: Final answer
    x = 214,777.76

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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.