Home / 487,046.20-671,688.57-305,775.03

Finding the Fourth Proportional to 487,046.20, 671,688.57 and 305,775.03

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Solution

The fourth proportional to 487,046.20, 671,688.57 and 305,775.03 is: 421,696.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,046.20 : 671,688.57 = 305,775.03 : x
  2. Step 2: Convert to fraction form
    487,046.20/671,688.57 = 305,775.03/x
  3. Step 3: Cross multiply
    487,046.20x = 671,688.57 × 305,775.03
  4. Step 4: Simplify right side
    487,046.20x = 205,385,592,642.41
  5. Step 5: Solve for x
    x = 205,385,592,642.41/487,046.20
  6. Step 6: Final answer
    x = 421,696.32

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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.