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Finding the Fourth Proportional to 642,151.76, 886,160.40 and 370,220.12

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Solution

The fourth proportional to 642,151.76, 886,160.40 and 370,220.12 is: 510,898.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,151.76 : 886,160.40 = 370,220.12 : x
  2. Step 2: Convert to fraction form
    642,151.76/886,160.40 = 370,220.12/x
  3. Step 3: Cross multiply
    642,151.76x = 886,160.40 × 370,220.12
  4. Step 4: Simplify right side
    642,151.76x = 328,074,409,627.25
  5. Step 5: Solve for x
    x = 328,074,409,627.25/642,151.76
  6. Step 6: Final answer
    x = 510,898.56

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Double scale
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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.