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Finding the Fourth Proportional to 642,397.10, 886,484.31 and 370,476.32

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Solution

The fourth proportional to 642,397.10, 886,484.31 and 370,476.32 is: 511,243.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,397.10 : 886,484.31 = 370,476.32 : x
  2. Step 2: Convert to fraction form
    642,397.10/886,484.31 = 370,476.32/x
  3. Step 3: Cross multiply
    642,397.10x = 886,484.31 × 370,476.32
  4. Step 4: Simplify right side
    642,397.10x = 328,421,444,906.54
  5. Step 5: Solve for x
    x = 328,421,444,906.54/642,397.10
  6. Step 6: Final answer
    x = 511,243.66

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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.