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Finding the Fourth Proportional to 309,312.67, 426,876.76 and 171,534.74

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Solution

The fourth proportional to 309,312.67, 426,876.76 and 171,534.74 is: 236,731.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,312.67 : 426,876.76 = 171,534.74 : x
  2. Step 2: Convert to fraction form
    309,312.67/426,876.76 = 171,534.74/x
  3. Step 3: Cross multiply
    309,312.67x = 426,876.76 × 171,534.74
  4. Step 4: Simplify right side
    309,312.67x = 73,224,194,038.64
  5. Step 5: Solve for x
    x = 73,224,194,038.64/309,312.67
  6. Step 6: Final answer
    x = 236,731.96

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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.