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Finding the Fourth Proportional to 280,854.79, 387,579.72 and 153,530.35

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Solution

The fourth proportional to 280,854.79, 387,579.72 and 153,530.35 is: 211,871.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,854.79 : 387,579.72 = 153,530.35 : x
  2. Step 2: Convert to fraction form
    280,854.79/387,579.72 = 153,530.35/x
  3. Step 3: Cross multiply
    280,854.79x = 387,579.72 × 153,530.35
  4. Step 4: Simplify right side
    280,854.79x = 59,505,250,064.50
  5. Step 5: Solve for x
    x = 59,505,250,064.50/280,854.79
  6. Step 6: Final answer
    x = 211,871.94

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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.