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Finding the Fourth Proportional to 448,718.40, 617,971.68 and 438,920.64

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Solution

The fourth proportional to 448,718.40, 617,971.68 and 438,920.64 is: 604,478.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,718.40 : 617,971.68 = 438,920.64 : x
  2. Step 2: Convert to fraction form
    448,718.40/617,971.68 = 438,920.64/x
  3. Step 3: Cross multiply
    448,718.40x = 617,971.68 × 438,920.64
  4. Step 4: Simplify right side
    448,718.40x = 271,240,525,287.48
  5. Step 5: Solve for x
    x = 271,240,525,287.48/448,718.40
  6. Step 6: Final answer
    x = 604,478.28

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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.