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Finding the Fourth Proportional to 559,987.80, 772,783.92 and 305,338.96

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Solution

The fourth proportional to 559,987.80, 772,783.92 and 305,338.96 is: 421,368.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,987.80 : 772,783.92 = 305,338.96 : x
  2. Step 2: Convert to fraction form
    559,987.80/772,783.92 = 305,338.96/x
  3. Step 3: Cross multiply
    559,987.80x = 772,783.92 × 305,338.96
  4. Step 4: Simplify right side
    559,987.80x = 235,961,038,437.52
  5. Step 5: Solve for x
    x = 235,961,038,437.52/559,987.80
  6. Step 6: Final answer
    x = 421,368.18

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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.