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Finding the Fourth Proportional to 282,368.13, 389,674.31 and 155,044.23

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Solution

The fourth proportional to 282,368.13, 389,674.31 and 155,044.23 is: 213,964.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,368.13 : 389,674.31 = 155,044.23 : x
  2. Step 2: Convert to fraction form
    282,368.13/389,674.31 = 155,044.23/x
  3. Step 3: Cross multiply
    282,368.13x = 389,674.31 × 155,044.23
  4. Step 4: Simplify right side
    282,368.13x = 60,416,752,569.51
  5. Step 5: Solve for x
    x = 60,416,752,569.51/282,368.13
  6. Step 6: Final answer
    x = 213,964.49

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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.