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Finding the Fourth Proportional to 620,060.42, 855,617.28 and 348,158

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Solution

The fourth proportional to 620,060.42, 855,617.28 and 348,158 is: 480,420.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,060.42 : 855,617.28 = 348,158 : x
  2. Step 2: Convert to fraction form
    620,060.42/855,617.28 = 348,158/x
  3. Step 3: Cross multiply
    620,060.42x = 855,617.28 × 348,158
  4. Step 4: Simplify right side
    620,060.42x = 297,890,000,970.24
  5. Step 5: Solve for x
    x = 297,890,000,970.24/620,060.42
  6. Step 6: Final answer
    x = 480,420.93

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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.