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Finding the Fourth Proportional to 404,659.40, 606,989.10 and 124,140.20

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Solution

The fourth proportional to 404,659.40, 606,989.10 and 124,140.20 is: 186,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,659.40 : 606,989.10 = 124,140.20 : x
  2. Step 2: Convert to fraction form
    404,659.40/606,989.10 = 124,140.20/x
  3. Step 3: Cross multiply
    404,659.40x = 606,989.10 × 124,140.20
  4. Step 4: Simplify right side
    404,659.40x = 75,351,748,271.82
  5. Step 5: Solve for x
    x = 75,351,748,271.82/404,659.40
  6. Step 6: Final answer
    x = 186,210.30

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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.