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Finding the Fourth Proportional to 555,642.40, 766,911.90 and 314,064.76

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Solution

The fourth proportional to 555,642.40, 766,911.90 and 314,064.76 is: 433,480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,642.40 : 766,911.90 = 314,064.76 : x
  2. Step 2: Convert to fraction form
    555,642.40/766,911.90 = 314,064.76/x
  3. Step 3: Cross multiply
    555,642.40x = 766,911.90 × 314,064.76
  4. Step 4: Simplify right side
    555,642.40x = 240,860,001,814.64
  5. Step 5: Solve for x
    x = 240,860,001,814.64/555,642.40
  6. Step 6: Final answer
    x = 433,480.24

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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.