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Finding the Fourth Proportional to 421,803.60, 582,083.64 and 240,509.40

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Solution

The fourth proportional to 421,803.60, 582,083.64 and 240,509.40 is: 331,899.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,803.60 : 582,083.64 = 240,509.40 : x
  2. Step 2: Convert to fraction form
    421,803.60/582,083.64 = 240,509.40/x
  3. Step 3: Cross multiply
    421,803.60x = 582,083.64 × 240,509.40
  4. Step 4: Simplify right side
    421,803.60x = 139,996,587,006.22
  5. Step 5: Solve for x
    x = 139,996,587,006.22/421,803.60
  6. Step 6: Final answer
    x = 331,899.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.