Home / 315,721.53-435,688.88-172,482.35

Finding the Fourth Proportional to 315,721.53, 435,688.88 and 172,482.35

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Solution

The fourth proportional to 315,721.53, 435,688.88 and 172,482.35 is: 238,021.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,721.53 : 435,688.88 = 172,482.35 : x
  2. Step 2: Convert to fraction form
    315,721.53/435,688.88 = 172,482.35/x
  3. Step 3: Cross multiply
    315,721.53x = 435,688.88 × 172,482.35
  4. Step 4: Simplify right side
    315,721.53x = 75,148,638,850.41
  5. Step 5: Solve for x
    x = 75,148,638,850.41/315,721.53
  6. Step 6: Final answer
    x = 238,021.90

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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.