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Finding the Fourth Proportional to 210,461.36, 315,581.16 and 143,920.40

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Solution

The fourth proportional to 210,461.36, 315,581.16 and 143,920.40 is: 215,804.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,461.36 : 315,581.16 = 143,920.40 : x
  2. Step 2: Convert to fraction form
    210,461.36/315,581.16 = 143,920.40/x
  3. Step 3: Cross multiply
    210,461.36x = 315,581.16 × 143,920.40
  4. Step 4: Simplify right side
    210,461.36x = 45,418,566,779.66
  5. Step 5: Solve for x
    x = 45,418,566,779.66/210,461.36
  6. Step 6: Final answer
    x = 215,804.78

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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.