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Finding the Fourth Proportional to 620,384.81, 856,070.57 and 348,390.86

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Solution

The fourth proportional to 620,384.81, 856,070.57 and 348,390.86 is: 480,745.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,384.81 : 856,070.57 = 348,390.86 : x
  2. Step 2: Convert to fraction form
    620,384.81/856,070.57 = 348,390.86/x
  3. Step 3: Cross multiply
    620,384.81x = 856,070.57 × 348,390.86
  4. Step 4: Simplify right side
    620,384.81x = 298,247,158,693.62
  5. Step 5: Solve for x
    x = 298,247,158,693.62/620,384.81
  6. Step 6: Final answer
    x = 480,745.43

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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.