Home / 553,330.60-763,586.18-311,612.20

Finding the Fourth Proportional to 553,330.60, 763,586.18 and 311,612.20

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Solution

The fourth proportional to 553,330.60, 763,586.18 and 311,612.20 is: 430,019.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,330.60 : 763,586.18 = 311,612.20 : x
  2. Step 2: Convert to fraction form
    553,330.60/763,586.18 = 311,612.20/x
  3. Step 3: Cross multiply
    553,330.60x = 763,586.18 × 311,612.20
  4. Step 4: Simplify right side
    553,330.60x = 237,942,769,439.40
  5. Step 5: Solve for x
    x = 237,942,769,439.40/553,330.60
  6. Step 6: Final answer
    x = 430,019.18

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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.