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Finding the Fourth Proportional to 614,626.72, 847,621.20 and 421,315.36

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Solution

The fourth proportional to 614,626.72, 847,621.20 and 421,315.36 is: 581,028.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,626.72 : 847,621.20 = 421,315.36 : x
  2. Step 2: Convert to fraction form
    614,626.72/847,621.20 = 421,315.36/x
  3. Step 3: Cross multiply
    614,626.72x = 847,621.20 × 421,315.36
  4. Step 4: Simplify right side
    614,626.72x = 357,115,831,021.63
  5. Step 5: Solve for x
    x = 357,115,831,021.63/614,626.72
  6. Step 6: Final answer
    x = 581,028.81

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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.