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Finding the Fourth Proportional to 620,813.16, 856,717.70 and 348,875.19

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Solution

The fourth proportional to 620,813.16, 856,717.70 and 348,875.19 is: 481,445.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,813.16 : 856,717.70 = 348,875.19 : x
  2. Step 2: Convert to fraction form
    620,813.16/856,717.70 = 348,875.19/x
  3. Step 3: Cross multiply
    620,813.16x = 856,717.70 × 348,875.19
  4. Step 4: Simplify right side
    620,813.16x = 298,887,548,619.49
  5. Step 5: Solve for x
    x = 298,887,548,619.49/620,813.16
  6. Step 6: Final answer
    x = 481,445.25

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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.