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Finding the Fourth Proportional to 665,804.46, 918,814.32 and 359,880.21

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Solution

The fourth proportional to 665,804.46, 918,814.32 and 359,880.21 is: 496,636.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,804.46 : 918,814.32 = 359,880.21 : x
  2. Step 2: Convert to fraction form
    665,804.46/918,814.32 = 359,880.21/x
  3. Step 3: Cross multiply
    665,804.46x = 918,814.32 × 359,880.21
  4. Step 4: Simplify right side
    665,804.46x = 330,663,090,432.61
  5. Step 5: Solve for x
    x = 330,663,090,432.61/665,804.46
  6. Step 6: Final answer
    x = 496,636.94

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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.