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Finding the Fourth Proportional to 642,522.72, 886,666.16 and 370,591.12

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Solution

The fourth proportional to 642,522.72, 886,666.16 and 370,591.12 is: 511,406.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,522.72 : 886,666.16 = 370,591.12 : x
  2. Step 2: Convert to fraction form
    642,522.72/886,666.16 = 370,591.12/x
  3. Step 3: Cross multiply
    642,522.72x = 886,666.16 × 370,591.12
  4. Step 4: Simplify right side
    642,522.72x = 328,590,605,300.50
  5. Step 5: Solve for x
    x = 328,590,605,300.50/642,522.72
  6. Step 6: Final answer
    x = 511,406.98

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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.