Home / 764,423.60-1,054,917.20-420,274.08

Finding the Fourth Proportional to 764,423.60, 1,054,917.20 and 420,274.08

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Solution

The fourth proportional to 764,423.60, 1,054,917.20 and 420,274.08 is: 579,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,423.60 : 1,054,917.20 = 420,274.08 : x
  2. Step 2: Convert to fraction form
    764,423.60/1,054,917.20 = 420,274.08/x
  3. Step 3: Cross multiply
    764,423.60x = 1,054,917.20 × 420,274.08
  4. Step 4: Simplify right side
    764,423.60x = 443,354,355,706.18
  5. Step 5: Solve for x
    x = 443,354,355,706.18/764,423.60
  6. Step 6: Final answer
    x = 579,985.18

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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.