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Finding the Fourth Proportional to 642,454.72, 886,563.60 and 370,534

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Solution

The fourth proportional to 642,454.72, 886,563.60 and 370,534 is: 511,323.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,454.72 : 886,563.60 = 370,534 : x
  2. Step 2: Convert to fraction form
    642,454.72/886,563.60 = 370,534/x
  3. Step 3: Cross multiply
    642,454.72x = 886,563.60 × 370,534
  4. Step 4: Simplify right side
    642,454.72x = 328,501,956,962.40
  5. Step 5: Solve for x
    x = 328,501,956,962.40/642,454.72
  6. Step 6: Final answer
    x = 511,323.13

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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.