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Finding the Fourth Proportional to 638,271.30, 956,422.80 and 553,634.40

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Solution

The fourth proportional to 638,271.30, 956,422.80 and 553,634.40 is: 829,597.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,271.30 : 956,422.80 = 553,634.40 : x
  2. Step 2: Convert to fraction form
    638,271.30/956,422.80 = 553,634.40/x
  3. Step 3: Cross multiply
    638,271.30x = 956,422.80 × 553,634.40
  4. Step 4: Simplify right side
    638,271.30x = 529,508,563,024.32
  5. Step 5: Solve for x
    x = 529,508,563,024.32/638,271.30
  6. Step 6: Final answer
    x = 829,597.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.