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Finding the Fourth Proportional to 612,658.85, 845,404.47 and 340,682.81

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Solution

The fourth proportional to 612,658.85, 845,404.47 and 340,682.81 is: 470,106.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,658.85 : 845,404.47 = 340,682.81 : x
  2. Step 2: Convert to fraction form
    612,658.85/845,404.47 = 340,682.81/x
  3. Step 3: Cross multiply
    612,658.85x = 845,404.47 × 340,682.81
  4. Step 4: Simplify right side
    612,658.85x = 288,014,766,199.14
  5. Step 5: Solve for x
    x = 288,014,766,199.14/612,658.85
  6. Step 6: Final answer
    x = 470,106.27

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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.