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Finding the Fourth Proportional to 423,809.08, 635,643.72 and 139,503.34

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Solution

The fourth proportional to 423,809.08, 635,643.72 and 139,503.34 is: 209,232.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,809.08 : 635,643.72 = 139,503.34 : x
  2. Step 2: Convert to fraction form
    423,809.08/635,643.72 = 139,503.34/x
  3. Step 3: Cross multiply
    423,809.08x = 635,643.72 × 139,503.34
  4. Step 4: Simplify right side
    423,809.08x = 88,674,421,990.02
  5. Step 5: Solve for x
    x = 88,674,421,990.02/423,809.08
  6. Step 6: Final answer
    x = 209,232.00

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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.