Home / 764,407.79-1,054,894.55-420,258.63

Finding the Fourth Proportional to 764,407.79, 1,054,894.55 and 420,258.63

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Solution

The fourth proportional to 764,407.79, 1,054,894.55 and 420,258.63 is: 579,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,407.79 : 1,054,894.55 = 420,258.63 : x
  2. Step 2: Convert to fraction form
    764,407.79/1,054,894.55 = 420,258.63/x
  3. Step 3: Cross multiply
    764,407.79x = 1,054,894.55 × 420,258.63
  4. Step 4: Simplify right side
    764,407.79x = 443,328,536,276.17
  5. Step 5: Solve for x
    x = 443,328,536,276.17/764,407.79
  6. Step 6: Final answer
    x = 579,963.40

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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.