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Finding the Fourth Proportional to 639,140.80, 958,709.98 and 372,714.48

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Solution

The fourth proportional to 639,140.80, 958,709.98 and 372,714.48 is: 559,071.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,140.80 : 958,709.98 = 372,714.48 : x
  2. Step 2: Convert to fraction form
    639,140.80/958,709.98 = 372,714.48/x
  3. Step 3: Cross multiply
    639,140.80x = 958,709.98 × 372,714.48
  4. Step 4: Simplify right side
    639,140.80x = 357,325,091,666.51
  5. Step 5: Solve for x
    x = 357,325,091,666.51/639,140.80
  6. Step 6: Final answer
    x = 559,071.01

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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.