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Finding the Fourth Proportional to 487,046.70, 671,689.26 and 305,775.53

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Solution

The fourth proportional to 487,046.70, 671,689.26 and 305,775.53 is: 421,697.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,046.70 : 671,689.26 = 305,775.53 : x
  2. Step 2: Convert to fraction form
    487,046.70/671,689.26 = 305,775.53/x
  3. Step 3: Cross multiply
    487,046.70x = 671,689.26 × 305,775.53
  4. Step 4: Simplify right side
    487,046.70x = 205,386,136,113.36
  5. Step 5: Solve for x
    x = 205,386,136,113.36/487,046.70
  6. Step 6: Final answer
    x = 421,697.01

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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.