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Finding the Fourth Proportional to 642,670.76, 886,886.36 and 356,191.07

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Solution

The fourth proportional to 642,670.76, 886,886.36 and 356,191.07 is: 491,544.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,670.76 : 886,886.36 = 356,191.07 : x
  2. Step 2: Convert to fraction form
    642,670.76/886,886.36 = 356,191.07/x
  3. Step 3: Cross multiply
    642,670.76x = 886,886.36 × 356,191.07
  4. Step 4: Simplify right side
    642,670.76x = 315,901,003,649.45
  5. Step 5: Solve for x
    x = 315,901,003,649.45/642,670.76
  6. Step 6: Final answer
    x = 491,544.08

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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.