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Finding the Fourth Proportional to 279,038.10, 385,062.05 and 151,709.30

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Solution

The fourth proportional to 279,038.10, 385,062.05 and 151,709.30 is: 209,353.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,038.10 : 385,062.05 = 151,709.30 : x
  2. Step 2: Convert to fraction form
    279,038.10/385,062.05 = 151,709.30/x
  3. Step 3: Cross multiply
    279,038.10x = 385,062.05 × 151,709.30
  4. Step 4: Simplify right side
    279,038.10x = 58,417,494,062.07
  5. Step 5: Solve for x
    x = 58,417,494,062.07/279,038.10
  6. Step 6: Final answer
    x = 209,353.11

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1.5x scale

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.