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Finding the Fourth Proportional to 403,005.60, 605,820.60 and 285,490.80

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Solution

The fourth proportional to 403,005.60, 605,820.60 and 285,490.80 is: 429,165.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,005.60 : 605,820.60 = 285,490.80 : x
  2. Step 2: Convert to fraction form
    403,005.60/605,820.60 = 285,490.80/x
  3. Step 3: Cross multiply
    403,005.60x = 605,820.60 × 285,490.80
  4. Step 4: Simplify right side
    403,005.60x = 172,956,207,750.48
  5. Step 5: Solve for x
    x = 172,956,207,750.48/403,005.60
  6. Step 6: Final answer
    x = 429,165.77

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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.