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Finding the Fourth Proportional to 665,491.33, 918,376 and 363,685.33

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Solution

The fourth proportional to 665,491.33, 918,376 and 363,685.33 is: 501,884.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,491.33 : 918,376 = 363,685.33 : x
  2. Step 2: Convert to fraction form
    665,491.33/918,376 = 363,685.33/x
  3. Step 3: Cross multiply
    665,491.33x = 918,376 × 363,685.33
  4. Step 4: Simplify right side
    665,491.33x = 333,999,878,624.08
  5. Step 5: Solve for x
    x = 333,999,878,624.08/665,491.33
  6. Step 6: Final answer
    x = 501,884.64

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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.