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Finding the Fourth Proportional to 423,807.51, 635,641.38 and 139,501.77

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Solution

The fourth proportional to 423,807.51, 635,641.38 and 139,501.77 is: 209,229.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,807.51 : 635,641.38 = 139,501.77 : x
  2. Step 2: Convert to fraction form
    423,807.51/635,641.38 = 139,501.77/x
  3. Step 3: Cross multiply
    423,807.51x = 635,641.38 × 139,501.77
  4. Step 4: Simplify right side
    423,807.51x = 88,673,097,595.24
  5. Step 5: Solve for x
    x = 88,673,097,595.24/423,807.51
  6. Step 6: Final answer
    x = 209,229.65

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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.