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Finding the Fourth Proportional to 1,308,802.40, 1,805,541.08 and 764,961.12

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Solution

The fourth proportional to 1,308,802.40, 1,805,541.08 and 764,961.12 is: 1,055,292.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308,802.40 : 1,805,541.08 = 764,961.12 : x
  2. Step 2: Convert to fraction form
    1,308,802.40/1,805,541.08 = 764,961.12/x
  3. Step 3: Cross multiply
    1,308,802.40x = 1,805,541.08 × 764,961.12
  4. Step 4: Simplify right side
    1,308,802.40x = 1,381,168,726,762.81
  5. Step 5: Solve for x
    x = 1,381,168,726,762.81/1,308,802.40
  6. Step 6: Final answer
    x = 1,055,292.02

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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.