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Finding the Fourth Proportional to 628,607.76, 867,497.76 and 342,148.56

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Solution

The fourth proportional to 628,607.76, 867,497.76 and 342,148.56 is: 472,175.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,607.76 : 867,497.76 = 342,148.56 : x
  2. Step 2: Convert to fraction form
    628,607.76/867,497.76 = 342,148.56/x
  3. Step 3: Cross multiply
    628,607.76x = 867,497.76 × 342,148.56
  4. Step 4: Simplify right side
    628,607.76x = 296,813,109,387.23
  5. Step 5: Solve for x
    x = 296,813,109,387.23/628,607.76
  6. Step 6: Final answer
    x = 472,175.38

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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.