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Finding the Fourth Proportional to 620,355.04, 856,120.92 and 348,408.88

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Solution

The fourth proportional to 620,355.04, 856,120.92 and 348,408.88 is: 480,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,355.04 : 856,120.92 = 348,408.88 : x
  2. Step 2: Convert to fraction form
    620,355.04/856,120.92 = 348,408.88/x
  3. Step 3: Cross multiply
    620,355.04x = 856,120.92 × 348,408.88
  4. Step 4: Simplify right side
    620,355.04x = 298,280,130,881.77
  5. Step 5: Solve for x
    x = 298,280,130,881.77/620,355.04
  6. Step 6: Final answer
    x = 480,821.65

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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.