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Finding the Fourth Proportional to 660,544.64, 911,556.96 and 358,740.80

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Solution

The fourth proportional to 660,544.64, 911,556.96 and 358,740.80 is: 495,065.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,544.64 : 911,556.96 = 358,740.80 : x
  2. Step 2: Convert to fraction form
    660,544.64/911,556.96 = 358,740.80/x
  3. Step 3: Cross multiply
    660,544.64x = 911,556.96 × 358,740.80
  4. Step 4: Simplify right side
    660,544.64x = 327,012,673,075.97
  5. Step 5: Solve for x
    x = 327,012,673,075.97/660,544.64
  6. Step 6: Final answer
    x = 495,065.21

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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.