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Finding the Fourth Proportional to 628,699.58, 867,625 and 342,238.76

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Solution

The fourth proportional to 628,699.58, 867,625 and 342,238.76 is: 472,300.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,699.58 : 867,625 = 342,238.76 : x
  2. Step 2: Convert to fraction form
    628,699.58/867,625 = 342,238.76/x
  3. Step 3: Cross multiply
    628,699.58x = 867,625 × 342,238.76
  4. Step 4: Simplify right side
    628,699.58x = 296,934,904,145
  5. Step 5: Solve for x
    x = 296,934,904,145/628,699.58
  6. Step 6: Final answer
    x = 472,300.15

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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.