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Finding the Fourth Proportional to 647,699.40, 972,126.84 and 645,288.06

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Solution

The fourth proportional to 647,699.40, 972,126.84 and 645,288.06 is: 968,507.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,699.40 : 972,126.84 = 645,288.06 : x
  2. Step 2: Convert to fraction form
    647,699.40/972,126.84 = 645,288.06/x
  3. Step 3: Cross multiply
    647,699.40x = 972,126.84 × 645,288.06
  4. Step 4: Simplify right side
    647,699.40x = 627,301,842,657.53
  5. Step 5: Solve for x
    x = 627,301,842,657.53/647,699.40
  6. Step 6: Final answer
    x = 968,507.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.