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Finding the Fourth Proportional to 282,503.57, 389,857.79 and 153,443.29

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Solution

The fourth proportional to 282,503.57, 389,857.79 and 153,443.29 is: 211,753.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,503.57 : 389,857.79 = 153,443.29 : x
  2. Step 2: Convert to fraction form
    282,503.57/389,857.79 = 153,443.29/x
  3. Step 3: Cross multiply
    282,503.57x = 389,857.79 × 153,443.29
  4. Step 4: Simplify right side
    282,503.57x = 59,821,061,162.51
  5. Step 5: Solve for x
    x = 59,821,061,162.51/282,503.57
  6. Step 6: Final answer
    x = 211,753.30

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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.