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Finding the Fourth Proportional to 660,584.40, 911,984.76 and 434,886

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Solution

The fourth proportional to 660,584.40, 911,984.76 and 434,886 is: 600,391.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,584.40 : 911,984.76 = 434,886 : x
  2. Step 2: Convert to fraction form
    660,584.40/911,984.76 = 434,886/x
  3. Step 3: Cross multiply
    660,584.40x = 911,984.76 × 434,886
  4. Step 4: Simplify right side
    660,584.40x = 396,609,404,337.36
  5. Step 5: Solve for x
    x = 396,609,404,337.36/660,584.40
  6. Step 6: Final answer
    x = 600,391.72

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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.