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Finding the Fourth Proportional to 354,776.01, 531,407.40 and 287,017.28

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Solution

The fourth proportional to 354,776.01, 531,407.40 and 287,017.28 is: 429,913.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,776.01 : 531,407.40 = 287,017.28 : x
  2. Step 2: Convert to fraction form
    354,776.01/531,407.40 = 287,017.28/x
  3. Step 3: Cross multiply
    354,776.01x = 531,407.40 × 287,017.28
  4. Step 4: Simplify right side
    354,776.01x = 152,523,106,519.87
  5. Step 5: Solve for x
    x = 152,523,106,519.87/354,776.01
  6. Step 6: Final answer
    x = 429,913.81

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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.