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Finding the Fourth Proportional to 620,574.64, 856,398.36 and 348,647.92

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Solution

The fourth proportional to 620,574.64, 856,398.36 and 348,647.92 is: 481,137.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,574.64 : 856,398.36 = 348,647.92 : x
  2. Step 2: Convert to fraction form
    620,574.64/856,398.36 = 348,647.92/x
  3. Step 3: Cross multiply
    620,574.64x = 856,398.36 × 348,647.92
  4. Step 4: Simplify right side
    620,574.64x = 298,581,506,905.41
  5. Step 5: Solve for x
    x = 298,581,506,905.41/620,574.64
  6. Step 6: Final answer
    x = 481,137.14

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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.