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Finding the Fourth Proportional to 451,642.17, 621,701.82 and 390,360.41

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Solution

The fourth proportional to 451,642.17, 621,701.82 and 390,360.41 is: 537,345.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,642.17 : 621,701.82 = 390,360.41 : x
  2. Step 2: Convert to fraction form
    451,642.17/621,701.82 = 390,360.41/x
  3. Step 3: Cross multiply
    451,642.17x = 621,701.82 × 390,360.41
  4. Step 4: Simplify right side
    451,642.17x = 242,687,774,244.44
  5. Step 5: Solve for x
    x = 242,687,774,244.44/451,642.17
  6. Step 6: Final answer
    x = 537,345.25

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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.