Home / 487,040.18-671,680.32-305,769.02

Finding the Fourth Proportional to 487,040.18, 671,680.32 and 305,769.02

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Solution

The fourth proportional to 487,040.18, 671,680.32 and 305,769.02 is: 421,688.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,040.18 : 671,680.32 = 305,769.02 : x
  2. Step 2: Convert to fraction form
    487,040.18/671,680.32 = 305,769.02/x
  3. Step 3: Cross multiply
    487,040.18x = 671,680.32 × 305,769.02
  4. Step 4: Simplify right side
    487,040.18x = 205,379,029,841.29
  5. Step 5: Solve for x
    x = 205,379,029,841.29/487,040.18
  6. Step 6: Final answer
    x = 421,688.06

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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.