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Finding the Fourth Proportional to 642,069.76, 886,065.52 and 370,132.72

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Solution

The fourth proportional to 642,069.76, 886,065.52 and 370,132.72 is: 510,788.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,069.76 : 886,065.52 = 370,132.72 : x
  2. Step 2: Convert to fraction form
    642,069.76/886,065.52 = 370,132.72/x
  3. Step 3: Cross multiply
    642,069.76x = 886,065.52 × 370,132.72
  4. Step 4: Simplify right side
    642,069.76x = 327,961,841,015.81
  5. Step 5: Solve for x
    x = 327,961,841,015.81/642,069.76
  6. Step 6: Final answer
    x = 510,788.49

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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.