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Finding the Fourth Proportional to 286,490.82, 429,328.71 and 211,017.45

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Solution

The fourth proportional to 286,490.82, 429,328.71 and 211,017.45 is: 316,226.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,490.82 : 429,328.71 = 211,017.45 : x
  2. Step 2: Convert to fraction form
    286,490.82/429,328.71 = 211,017.45/x
  3. Step 3: Cross multiply
    286,490.82x = 429,328.71 × 211,017.45
  4. Step 4: Simplify right side
    286,490.82x = 90,595,849,595.99
  5. Step 5: Solve for x
    x = 90,595,849,595.99/286,490.82
  6. Step 6: Final answer
    x = 316,226.01

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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.