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Finding the Fourth Proportional to 257,267.79, 354,916.40 and 155,236.37

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Solution

The fourth proportional to 257,267.79, 354,916.40 and 155,236.37 is: 214,157.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,267.79 : 354,916.40 = 155,236.37 : x
  2. Step 2: Convert to fraction form
    257,267.79/354,916.40 = 155,236.37/x
  3. Step 3: Cross multiply
    257,267.79x = 354,916.40 × 155,236.37
  4. Step 4: Simplify right side
    257,267.79x = 55,095,931,038.70
  5. Step 5: Solve for x
    x = 55,095,931,038.70/257,267.79
  6. Step 6: Final answer
    x = 214,157.91

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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.