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Finding the Fourth Proportional to 487,101.90, 671,763.84 and 405,700.38

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Solution

The fourth proportional to 487,101.90, 671,763.84 and 405,700.38 is: 559,502.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,101.90 : 671,763.84 = 405,700.38 : x
  2. Step 2: Convert to fraction form
    487,101.90/671,763.84 = 405,700.38/x
  3. Step 3: Cross multiply
    487,101.90x = 671,763.84 × 405,700.38
  4. Step 4: Simplify right side
    487,101.90x = 272,534,845,158.26
  5. Step 5: Solve for x
    x = 272,534,845,158.26/487,101.90
  6. Step 6: Final answer
    x = 559,502.73

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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.