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Finding the Fourth Proportional to 646,260, 891,258.18 and 404,564.58

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Solution

The fourth proportional to 646,260, 891,258.18 and 404,564.58 is: 557,935.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,260 : 891,258.18 = 404,564.58 : x
  2. Step 2: Convert to fraction form
    646,260/891,258.18 = 404,564.58/x
  3. Step 3: Cross multiply
    646,260x = 891,258.18 × 404,564.58
  4. Step 4: Simplify right side
    646,260x = 360,571,491,263.26
  5. Step 5: Solve for x
    x = 360,571,491,263.26/646,260
  6. Step 6: Final answer
    x = 557,935.65

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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.