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Finding the Fourth Proportional to 555,497.03, 766,601.65 and 313,789.79

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Solution

The fourth proportional to 555,497.03, 766,601.65 and 313,789.79 is: 433,038.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,497.03 : 766,601.65 = 313,789.79 : x
  2. Step 2: Convert to fraction form
    555,497.03/766,601.65 = 313,789.79/x
  3. Step 3: Cross multiply
    555,497.03x = 766,601.65 × 313,789.79
  4. Step 4: Simplify right side
    555,497.03x = 240,551,773,075.90
  5. Step 5: Solve for x
    x = 240,551,773,075.90/555,497.03
  6. Step 6: Final answer
    x = 433,038.81

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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.