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Finding the Fourth Proportional to 660,245.16, 911,355.12 and 388,301.16

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Solution

The fourth proportional to 660,245.16, 911,355.12 and 388,301.16 is: 535,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,245.16 : 911,355.12 = 388,301.16 : x
  2. Step 2: Convert to fraction form
    660,245.16/911,355.12 = 388,301.16/x
  3. Step 3: Cross multiply
    660,245.16x = 911,355.12 × 388,301.16
  4. Step 4: Simplify right side
    660,245.16x = 353,880,250,267.94
  5. Step 5: Solve for x
    x = 353,880,250,267.94/660,245.16
  6. Step 6: Final answer
    x = 535,983.10

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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.