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Finding the Fourth Proportional to 487,681.44, 671,505.04 and 426,912

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Solution

The fourth proportional to 487,681.44, 671,505.04 and 426,912 is: 587,829.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,681.44 : 671,505.04 = 426,912 : x
  2. Step 2: Convert to fraction form
    487,681.44/671,505.04 = 426,912/x
  3. Step 3: Cross multiply
    487,681.44x = 671,505.04 × 426,912
  4. Step 4: Simplify right side
    487,681.44x = 286,673,559,636.48
  5. Step 5: Solve for x
    x = 286,673,559,636.48/487,681.44
  6. Step 6: Final answer
    x = 587,829.55

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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.