Home / 811,749.70-1,119,943.29-472,145.86

Finding the Fourth Proportional to 811,749.70, 1,119,943.29 and 472,145.86

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Solution

The fourth proportional to 811,749.70, 1,119,943.29 and 472,145.86 is: 651,403.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,749.70 : 1,119,943.29 = 472,145.86 : x
  2. Step 2: Convert to fraction form
    811,749.70/1,119,943.29 = 472,145.86/x
  3. Step 3: Cross multiply
    811,749.70x = 1,119,943.29 × 472,145.86
  4. Step 4: Simplify right side
    811,749.70x = 528,776,587,808.28
  5. Step 5: Solve for x
    x = 528,776,587,808.28/811,749.70
  6. Step 6: Final answer
    x = 651,403.49

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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.