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Finding the Fourth Proportional to 638,267.80, 956,417.55 and 553,630.90

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Solution

The fourth proportional to 638,267.80, 956,417.55 and 553,630.90 is: 829,592.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,267.80 : 956,417.55 = 553,630.90 : x
  2. Step 2: Convert to fraction form
    638,267.80/956,417.55 = 553,630.90/x
  3. Step 3: Cross multiply
    638,267.80x = 956,417.55 × 553,630.90
  4. Step 4: Simplify right side
    638,267.80x = 529,502,308,982.30
  5. Step 5: Solve for x
    x = 529,502,308,982.30/638,267.80
  6. Step 6: Final answer
    x = 829,592.70

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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.