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Finding the Fourth Proportional to 660,698.28, 911,739.25 and 358,885.80

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Solution

The fourth proportional to 660,698.28, 911,739.25 and 358,885.80 is: 495,249.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,698.28 : 911,739.25 = 358,885.80 : x
  2. Step 2: Convert to fraction form
    660,698.28/911,739.25 = 358,885.80/x
  3. Step 3: Cross multiply
    660,698.28x = 911,739.25 × 358,885.80
  4. Step 4: Simplify right side
    660,698.28x = 327,210,270,127.65
  5. Step 5: Solve for x
    x = 327,210,270,127.65/660,698.28
  6. Step 6: Final answer
    x = 495,249.16

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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.