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Finding the Fourth Proportional to 369,987.78, 511,073.20 and 297,663.00

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Solution

The fourth proportional to 369,987.78, 511,073.20 and 297,663.00 is: 411,169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,987.78 : 511,073.20 = 297,663.00 : x
  2. Step 2: Convert to fraction form
    369,987.78/511,073.20 = 297,663.00/x
  3. Step 3: Cross multiply
    369,987.78x = 511,073.20 × 297,663.00
  4. Step 4: Simplify right side
    369,987.78x = 152,127,581,587.59
  5. Step 5: Solve for x
    x = 152,127,581,587.59/369,987.78
  6. Step 6: Final answer
    x = 411,169.21

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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.