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Finding the Fourth Proportional to 639,014.40, 881,842.80 and 352,534.40

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Solution

The fourth proportional to 639,014.40, 881,842.80 and 352,534.40 is: 486,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,014.40 : 881,842.80 = 352,534.40 : x
  2. Step 2: Convert to fraction form
    639,014.40/881,842.80 = 352,534.40/x
  3. Step 3: Cross multiply
    639,014.40x = 881,842.80 × 352,534.40
  4. Step 4: Simplify right side
    639,014.40x = 310,879,922,392.32
  5. Step 5: Solve for x
    x = 310,879,922,392.32/639,014.40
  6. Step 6: Final answer
    x = 486,499.09

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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.