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Finding the Fourth Proportional to 639,386.69, 882,290.72 and 352,888.34

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Solution

The fourth proportional to 639,386.69, 882,290.72 and 352,888.34 is: 486,951.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,386.69 : 882,290.72 = 352,888.34 : x
  2. Step 2: Convert to fraction form
    639,386.69/882,290.72 = 352,888.34/x
  3. Step 3: Cross multiply
    639,386.69x = 882,290.72 × 352,888.34
  4. Step 4: Simplify right side
    639,386.69x = 311,350,101,402.31
  5. Step 5: Solve for x
    x = 311,350,101,402.31/639,386.69
  6. Step 6: Final answer
    x = 486,951.18

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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.