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Finding the Fourth Proportional to 553,959.19, 764,499.62 and 308,971.45

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Solution

The fourth proportional to 553,959.19, 764,499.62 and 308,971.45 is: 426,400.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,959.19 : 764,499.62 = 308,971.45 : x
  2. Step 2: Convert to fraction form
    553,959.19/764,499.62 = 308,971.45/x
  3. Step 3: Cross multiply
    553,959.19x = 764,499.62 × 308,971.45
  4. Step 4: Simplify right side
    553,959.19x = 236,208,550,748.49
  5. Step 5: Solve for x
    x = 236,208,550,748.49/553,959.19
  6. Step 6: Final answer
    x = 426,400.64

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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.