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Finding the Fourth Proportional to 316,318.40, 473,786.40 and 245,643.20

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Solution

The fourth proportional to 316,318.40, 473,786.40 and 245,643.20 is: 367,928.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,318.40 : 473,786.40 = 245,643.20 : x
  2. Step 2: Convert to fraction form
    316,318.40/473,786.40 = 245,643.20/x
  3. Step 3: Cross multiply
    316,318.40x = 473,786.40 × 245,643.20
  4. Step 4: Simplify right side
    316,318.40x = 116,382,407,412.48
  5. Step 5: Solve for x
    x = 116,382,407,412.48/316,318.40
  6. Step 6: Final answer
    x = 367,928.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.