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Finding the Fourth Proportional to 553,325.82, 763,581.51 and 311,608.86

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Solution

The fourth proportional to 553,325.82, 763,581.51 and 311,608.86 is: 430,015.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,325.82 : 763,581.51 = 311,608.86 : x
  2. Step 2: Convert to fraction form
    553,325.82/763,581.51 = 311,608.86/x
  3. Step 3: Cross multiply
    553,325.82x = 763,581.51 × 311,608.86
  4. Step 4: Simplify right side
    553,325.82x = 237,938,763,848.18
  5. Step 5: Solve for x
    x = 237,938,763,848.18/553,325.82
  6. Step 6: Final answer
    x = 430,015.65

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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.