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Finding the Fourth Proportional to 578,642.40, 867,963.60 and 368,431.20

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Solution

The fourth proportional to 578,642.40, 867,963.60 and 368,431.20 is: 552,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,642.40 : 867,963.60 = 368,431.20 : x
  2. Step 2: Convert to fraction form
    578,642.40/867,963.60 = 368,431.20/x
  3. Step 3: Cross multiply
    578,642.40x = 867,963.60 × 368,431.20
  4. Step 4: Simplify right side
    578,642.40x = 319,784,870,704.32
  5. Step 5: Solve for x
    x = 319,784,870,704.32/578,642.40
  6. Step 6: Final answer
    x = 552,646.80

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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.