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Finding the Fourth Proportional to 426,303.54, 639,455.40 and 216,001.62

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Solution

The fourth proportional to 426,303.54, 639,455.40 and 216,001.62 is: 324,002.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,303.54 : 639,455.40 = 216,001.62 : x
  2. Step 2: Convert to fraction form
    426,303.54/639,455.40 = 216,001.62/x
  3. Step 3: Cross multiply
    426,303.54x = 639,455.40 × 216,001.62
  4. Step 4: Simplify right side
    426,303.54x = 138,123,402,317.75
  5. Step 5: Solve for x
    x = 138,123,402,317.75/426,303.54
  6. Step 6: Final answer
    x = 324,002.48

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1.5x scale

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.