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Finding the Fourth Proportional to 312,528.62, 431,263.94 and 176,574.38

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Solution

The fourth proportional to 312,528.62, 431,263.94 and 176,574.38 is: 243,658.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,528.62 : 431,263.94 = 176,574.38 : x
  2. Step 2: Convert to fraction form
    312,528.62/431,263.94 = 176,574.38/x
  3. Step 3: Cross multiply
    312,528.62x = 431,263.94 × 176,574.38
  4. Step 4: Simplify right side
    312,528.62x = 76,150,159,782.67
  5. Step 5: Solve for x
    x = 76,150,159,782.67/312,528.62
  6. Step 6: Final answer
    x = 243,658.19

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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.