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Finding the Fourth Proportional to 451,648.17, 621,710.10 and 390,366.41

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Solution

The fourth proportional to 451,648.17, 621,710.10 and 390,366.41 is: 537,353.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,648.17 : 621,710.10 = 390,366.41 : x
  2. Step 2: Convert to fraction form
    451,648.17/621,710.10 = 390,366.41/x
  3. Step 3: Cross multiply
    451,648.17x = 621,710.10 × 390,366.41
  4. Step 4: Simplify right side
    451,648.17x = 242,694,736,689.19
  5. Step 5: Solve for x
    x = 242,694,736,689.19/451,648.17
  6. Step 6: Final answer
    x = 537,353.53

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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.