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Finding the Fourth Proportional to 660,454.08, 911,430 and 358,648.08

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Solution

The fourth proportional to 660,454.08, 911,430 and 358,648.08 is: 494,936.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,454.08 : 911,430 = 358,648.08 : x
  2. Step 2: Convert to fraction form
    660,454.08/911,430 = 358,648.08/x
  3. Step 3: Cross multiply
    660,454.08x = 911,430 × 358,648.08
  4. Step 4: Simplify right side
    660,454.08x = 326,882,619,554.40
  5. Step 5: Solve for x
    x = 326,882,619,554.40/660,454.08
  6. Step 6: Final answer
    x = 494,936.18

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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.