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Finding the Fourth Proportional to 620,428.37, 856,191.59 and 348,496.40

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Solution

The fourth proportional to 620,428.37, 856,191.59 and 348,496.40 is: 480,925.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,428.37 : 856,191.59 = 348,496.40 : x
  2. Step 2: Convert to fraction form
    620,428.37/856,191.59 = 348,496.40/x
  3. Step 3: Cross multiply
    620,428.37x = 856,191.59 × 348,496.40
  4. Step 4: Simplify right side
    620,428.37x = 298,379,688,530.14
  5. Step 5: Solve for x
    x = 298,379,688,530.14/620,428.37
  6. Step 6: Final answer
    x = 480,925.29

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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.