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Finding the Fourth Proportional to 660,218.50, 911,112.57 and 358,412.50

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Solution

The fourth proportional to 660,218.50, 911,112.57 and 358,412.50 is: 494,615.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,218.50 : 911,112.57 = 358,412.50 : x
  2. Step 2: Convert to fraction form
    660,218.50/911,112.57 = 358,412.50/x
  3. Step 3: Cross multiply
    660,218.50x = 911,112.57 × 358,412.50
  4. Step 4: Simplify right side
    660,218.50x = 326,554,133,995.13
  5. Step 5: Solve for x
    x = 326,554,133,995.13/660,218.50
  6. Step 6: Final answer
    x = 494,615.24

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1.5x scale

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.