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Finding the Fourth Proportional to 660,672.60, 911,873.34 and 434,339.16

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Solution

The fourth proportional to 660,672.60, 911,873.34 and 434,339.16 is: 599,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,672.60 : 911,873.34 = 434,339.16 : x
  2. Step 2: Convert to fraction form
    660,672.60/911,873.34 = 434,339.16/x
  3. Step 3: Cross multiply
    660,672.60x = 911,873.34 × 434,339.16
  4. Step 4: Simplify right side
    660,672.60x = 396,062,300,521.99
  5. Step 5: Solve for x
    x = 396,062,300,521.99/660,672.60
  6. Step 6: Final answer
    x = 599,483.47

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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.