Home / 486,397.78-671,240.28-305,117.36

Finding the Fourth Proportional to 486,397.78, 671,240.28 and 305,117.36

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Solution

The fourth proportional to 486,397.78, 671,240.28 and 305,117.36 is: 421,069.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,397.78 : 671,240.28 = 305,117.36 : x
  2. Step 2: Convert to fraction form
    486,397.78/671,240.28 = 305,117.36/x
  3. Step 3: Cross multiply
    486,397.78x = 671,240.28 × 305,117.36
  4. Step 4: Simplify right side
    486,397.78x = 204,807,062,159.26
  5. Step 5: Solve for x
    x = 204,807,062,159.26/486,397.78
  6. Step 6: Final answer
    x = 421,069.07

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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.