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Finding the Fourth Proportional to 639,809.99, 959,712.25 and 260,646.15

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Solution

The fourth proportional to 639,809.99, 959,712.25 and 260,646.15 is: 390,968.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,809.99 : 959,712.25 = 260,646.15 : x
  2. Step 2: Convert to fraction form
    639,809.99/959,712.25 = 260,646.15/x
  3. Step 3: Cross multiply
    639,809.99x = 959,712.25 × 260,646.15
  4. Step 4: Simplify right side
    639,809.99x = 250,145,306,506.36
  5. Step 5: Solve for x
    x = 250,145,306,506.36/639,809.99
  6. Step 6: Final answer
    x = 390,968.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.