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Finding the Fourth Proportional to 312,528.04, 431,288.28 and 169,288.65

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Solution

The fourth proportional to 312,528.04, 431,288.28 and 169,288.65 is: 233,618.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,528.04 : 431,288.28 = 169,288.65 : x
  2. Step 2: Convert to fraction form
    312,528.04/431,288.28 = 169,288.65/x
  3. Step 3: Cross multiply
    312,528.04x = 431,288.28 × 169,288.65
  4. Step 4: Simplify right side
    312,528.04x = 73,012,210,682.02
  5. Step 5: Solve for x
    x = 73,012,210,682.02/312,528.04
  6. Step 6: Final answer
    x = 233,618.11

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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.