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Finding the Fourth Proportional to 421,595.70, 581,747.90 and 258,325.21

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Solution

The fourth proportional to 421,595.70, 581,747.90 and 258,325.21 is: 356,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,595.70 : 581,747.90 = 258,325.21 : x
  2. Step 2: Convert to fraction form
    421,595.70/581,747.90 = 258,325.21/x
  3. Step 3: Cross multiply
    421,595.70x = 581,747.90 × 258,325.21
  4. Step 4: Simplify right side
    421,595.70x = 150,280,148,434.56
  5. Step 5: Solve for x
    x = 150,280,148,434.56/421,595.70
  6. Step 6: Final answer
    x = 356,455.60

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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.