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Finding the Fourth Proportional to 811,063.76, 1,119,256.32 and 448,479.68

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Solution

The fourth proportional to 811,063.76, 1,119,256.32 and 448,479.68 is: 618,895.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,063.76 : 1,119,256.32 = 448,479.68 : x
  2. Step 2: Convert to fraction form
    811,063.76/1,119,256.32 = 448,479.68/x
  3. Step 3: Cross multiply
    811,063.76x = 1,119,256.32 × 448,479.68
  4. Step 4: Simplify right side
    811,063.76x = 501,963,716,231.58
  5. Step 5: Solve for x
    x = 501,963,716,231.58/811,063.76
  6. Step 6: Final answer
    x = 618,895.51

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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.