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Finding the Fourth Proportional to 639,045.76, 881,886 and 352,574.28

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Solution

The fourth proportional to 639,045.76, 881,886 and 352,574.28 is: 486,554.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,045.76 : 881,886 = 352,574.28 : x
  2. Step 2: Convert to fraction form
    639,045.76/881,886 = 352,574.28/x
  3. Step 3: Cross multiply
    639,045.76x = 881,886 × 352,574.28
  4. Step 4: Simplify right side
    639,045.76x = 310,930,321,492.08
  5. Step 5: Solve for x
    x = 310,930,321,492.08/639,045.76
  6. Step 6: Final answer
    x = 486,554.08

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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.