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Finding the Fourth Proportional to 469,979.79, 648,572.93 and 255,120

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Solution

The fourth proportional to 469,979.79, 648,572.93 and 255,120 is: 352,066.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,979.79 : 648,572.93 = 255,120 : x
  2. Step 2: Convert to fraction form
    469,979.79/648,572.93 = 255,120/x
  3. Step 3: Cross multiply
    469,979.79x = 648,572.93 × 255,120
  4. Step 4: Simplify right side
    469,979.79x = 165,463,925,901.60
  5. Step 5: Solve for x
    x = 165,463,925,901.60/469,979.79
  6. Step 6: Final answer
    x = 352,066.05

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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.