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Finding the Fourth Proportional to 665,809.46, 918,821.22 and 359,885.21

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Solution

The fourth proportional to 665,809.46, 918,821.22 and 359,885.21 is: 496,643.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,809.46 : 918,821.22 = 359,885.21 : x
  2. Step 2: Convert to fraction form
    665,809.46/918,821.22 = 359,885.21/x
  3. Step 3: Cross multiply
    665,809.46x = 918,821.22 × 359,885.21
  4. Step 4: Simplify right side
    665,809.46x = 330,670,167,712.16
  5. Step 5: Solve for x
    x = 330,670,167,712.16/665,809.46
  6. Step 6: Final answer
    x = 496,643.84

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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.