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Finding the Fourth Proportional to 553,544.80, 763,964.40 and 311,874.02

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Solution

The fourth proportional to 553,544.80, 763,964.40 and 311,874.02 is: 430,427.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,544.80 : 763,964.40 = 311,874.02 : x
  2. Step 2: Convert to fraction form
    553,544.80/763,964.40 = 311,874.02/x
  3. Step 3: Cross multiply
    553,544.80x = 763,964.40 × 311,874.02
  4. Step 4: Simplify right side
    553,544.80x = 238,260,648,564.89
  5. Step 5: Solve for x
    x = 238,260,648,564.89/553,544.80
  6. Step 6: Final answer
    x = 430,427.04

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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.