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Finding the Fourth Proportional to 292,992.40, 439,780.20 and 143,401.60

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Solution

The fourth proportional to 292,992.40, 439,780.20 and 143,401.60 is: 215,245.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,992.40 : 439,780.20 = 143,401.60 : x
  2. Step 2: Convert to fraction form
    292,992.40/439,780.20 = 143,401.60/x
  3. Step 3: Cross multiply
    292,992.40x = 439,780.20 × 143,401.60
  4. Step 4: Simplify right side
    292,992.40x = 63,065,184,328.32
  5. Step 5: Solve for x
    x = 63,065,184,328.32/292,992.40
  6. Step 6: Final answer
    x = 215,245.12

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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.