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Finding the Fourth Proportional to 315,292.36, 435,112.71 and 172,061.65

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Solution

The fourth proportional to 315,292.36, 435,112.71 and 172,061.65 is: 237,450.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,292.36 : 435,112.71 = 172,061.65 : x
  2. Step 2: Convert to fraction form
    315,292.36/435,112.71 = 172,061.65/x
  3. Step 3: Cross multiply
    315,292.36x = 435,112.71 × 172,061.65
  4. Step 4: Simplify right side
    315,292.36x = 74,866,208,643.01
  5. Step 5: Solve for x
    x = 74,866,208,643.01/315,292.36
  6. Step 6: Final answer
    x = 237,450.12

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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.