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Finding the Fourth Proportional to 315,317.36, 435,137.83 and 172,077.40

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Solution

The fourth proportional to 315,317.36, 435,137.83 and 172,077.40 is: 237,466.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,317.36 : 435,137.83 = 172,077.40 : x
  2. Step 2: Convert to fraction form
    315,317.36/435,137.83 = 172,077.40/x
  3. Step 3: Cross multiply
    315,317.36x = 435,137.83 × 172,077.40
  4. Step 4: Simplify right side
    315,317.36x = 74,877,385,555.29
  5. Step 5: Solve for x
    x = 74,877,385,555.29/315,317.36
  6. Step 6: Final answer
    x = 237,466.74

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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.