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Finding the Fourth Proportional to 210,155.51, 315,447.71 and 153,828.32

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Solution

The fourth proportional to 210,155.51, 315,447.71 and 153,828.32 is: 230,899.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,155.51 : 315,447.71 = 153,828.32 : x
  2. Step 2: Convert to fraction form
    210,155.51/315,447.71 = 153,828.32/x
  3. Step 3: Cross multiply
    210,155.51x = 315,447.71 × 153,828.32
  4. Step 4: Simplify right side
    210,155.51x = 48,524,788,930.77
  5. Step 5: Solve for x
    x = 48,524,788,930.77/210,155.51
  6. Step 6: Final answer
    x = 230,899.43

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1.5x scale

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.