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Finding the Fourth Proportional to 620,424.31, 856,186 and 348,492.35

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Solution

The fourth proportional to 620,424.31, 856,186 and 348,492.35 is: 480,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,424.31 : 856,186 = 348,492.35 : x
  2. Step 2: Convert to fraction form
    620,424.31/856,186 = 348,492.35/x
  3. Step 3: Cross multiply
    620,424.31x = 856,186 × 348,492.35
  4. Step 4: Simplify right side
    620,424.31x = 298,374,271,177.10
  5. Step 5: Solve for x
    x = 298,374,271,177.10/620,424.31
  6. Step 6: Final answer
    x = 480,919.70

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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.