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Finding the Fourth Proportional to 620,065.42, 855,624.18 and 348,163

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Solution

The fourth proportional to 620,065.42, 855,624.18 and 348,163 is: 480,427.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,065.42 : 855,624.18 = 348,163 : x
  2. Step 2: Convert to fraction form
    620,065.42/855,624.18 = 348,163/x
  3. Step 3: Cross multiply
    620,065.42x = 855,624.18 × 348,163
  4. Step 4: Simplify right side
    620,065.42x = 297,896,681,381.34
  5. Step 5: Solve for x
    x = 297,896,681,381.34/620,065.42
  6. Step 6: Final answer
    x = 480,427.83

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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.