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Finding the Fourth Proportional to 426,554.82, 640,225.84 and 216,340.38

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Solution

The fourth proportional to 426,554.82, 640,225.84 and 216,340.38 is: 324,710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,554.82 : 640,225.84 = 216,340.38 : x
  2. Step 2: Convert to fraction form
    426,554.82/640,225.84 = 216,340.38/x
  3. Step 3: Cross multiply
    426,554.82x = 640,225.84 × 216,340.38
  4. Step 4: Simplify right side
    426,554.82x = 138,506,701,511.42
  5. Step 5: Solve for x
    x = 138,506,701,511.42/426,554.82
  6. Step 6: Final answer
    x = 324,710.20

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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.