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Finding the Fourth Proportional to 403,441.40, 604,987.12 and 137,130.40

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Solution

The fourth proportional to 403,441.40, 604,987.12 and 137,130.40 is: 205,636.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,441.40 : 604,987.12 = 137,130.40 : x
  2. Step 2: Convert to fraction form
    403,441.40/604,987.12 = 137,130.40/x
  3. Step 3: Cross multiply
    403,441.40x = 604,987.12 × 137,130.40
  4. Step 4: Simplify right side
    403,441.40x = 82,962,125,760.45
  5. Step 5: Solve for x
    x = 82,962,125,760.45/403,441.40
  6. Step 6: Final answer
    x = 205,636.12

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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.