Home / 420,128.55-630,192.83-346,317.30

Finding the Fourth Proportional to 420,128.55, 630,192.83 and 346,317.30

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Solution

The fourth proportional to 420,128.55, 630,192.83 and 346,317.30 is: 519,475.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,128.55 : 630,192.83 = 346,317.30 : x
  2. Step 2: Convert to fraction form
    420,128.55/630,192.83 = 346,317.30/x
  3. Step 3: Cross multiply
    420,128.55x = 630,192.83 × 346,317.30
  4. Step 4: Simplify right side
    420,128.55x = 218,246,677,633.37
  5. Step 5: Solve for x
    x = 218,246,677,633.37/420,128.55
  6. Step 6: Final answer
    x = 519,475.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.