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Finding the Fourth Proportional to 642,820.86, 887,085.81 and 370,885.50

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Solution

The fourth proportional to 642,820.86, 887,085.81 and 370,885.50 is: 511,817.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,820.86 : 887,085.81 = 370,885.50 : x
  2. Step 2: Convert to fraction form
    642,820.86/887,085.81 = 370,885.50/x
  3. Step 3: Cross multiply
    642,820.86x = 887,085.81 × 370,885.50
  4. Step 4: Simplify right side
    642,820.86x = 329,007,264,184.76
  5. Step 5: Solve for x
    x = 329,007,264,184.76/642,820.86
  6. Step 6: Final answer
    x = 511,817.96

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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.