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Finding the Fourth Proportional to 678,699.40, 936,616.46 and 372,804.08

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Solution

The fourth proportional to 678,699.40, 936,616.46 and 372,804.08 is: 514,475.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,699.40 : 936,616.46 = 372,804.08 : x
  2. Step 2: Convert to fraction form
    678,699.40/936,616.46 = 372,804.08/x
  3. Step 3: Cross multiply
    678,699.40x = 936,616.46 × 372,804.08
  4. Step 4: Simplify right side
    678,699.40x = 349,174,437,683.16
  5. Step 5: Solve for x
    x = 349,174,437,683.16/678,699.40
  6. Step 6: Final answer
    x = 514,475.83

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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.