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Finding the Fourth Proportional to 613,271.80, 919,907.70 and 400,695.40

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Solution

The fourth proportional to 613,271.80, 919,907.70 and 400,695.40 is: 601,043.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,271.80 : 919,907.70 = 400,695.40 : x
  2. Step 2: Convert to fraction form
    613,271.80/919,907.70 = 400,695.40/x
  3. Step 3: Cross multiply
    613,271.80x = 919,907.70 × 400,695.40
  4. Step 4: Simplify right side
    613,271.80x = 368,602,783,814.58
  5. Step 5: Solve for x
    x = 368,602,783,814.58/613,271.80
  6. Step 6: Final answer
    x = 601,043.10

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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.