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Finding the Fourth Proportional to 348,742.32, 478,119.90 and 342,443.76

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Solution

The fourth proportional to 348,742.32, 478,119.90 and 342,443.76 is: 469,484.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,742.32 : 478,119.90 = 342,443.76 : x
  2. Step 2: Convert to fraction form
    348,742.32/478,119.90 = 342,443.76/x
  3. Step 3: Cross multiply
    348,742.32x = 478,119.90 × 342,443.76
  4. Step 4: Simplify right side
    348,742.32x = 163,729,176,286.82
  5. Step 5: Solve for x
    x = 163,729,176,286.82/348,742.32
  6. Step 6: Final answer
    x = 469,484.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.