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Finding the Fourth Proportional to 611,506.40, 843,817.23 and 357,005.21

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Solution

The fourth proportional to 611,506.40, 843,817.23 and 357,005.21 is: 492,631.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,506.40 : 843,817.23 = 357,005.21 : x
  2. Step 2: Convert to fraction form
    611,506.40/843,817.23 = 357,005.21/x
  3. Step 3: Cross multiply
    611,506.40x = 843,817.23 × 357,005.21
  4. Step 4: Simplify right side
    611,506.40x = 301,247,143,178.68
  5. Step 5: Solve for x
    x = 301,247,143,178.68/611,506.40
  6. Step 6: Final answer
    x = 492,631.22

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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.