Home / 312,918.80-431,827.08-169,678.40

Finding the Fourth Proportional to 312,918.80, 431,827.08 and 169,678.40

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Solution

The fourth proportional to 312,918.80, 431,827.08 and 169,678.40 is: 234,155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,918.80 : 431,827.08 = 169,678.40 : x
  2. Step 2: Convert to fraction form
    312,918.80/431,827.08 = 169,678.40/x
  3. Step 3: Cross multiply
    312,918.80x = 431,827.08 × 169,678.40
  4. Step 4: Simplify right side
    312,918.80x = 73,271,728,011.07
  5. Step 5: Solve for x
    x = 73,271,728,011.07/312,918.80
  6. Step 6: Final answer
    x = 234,155.72

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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.