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Finding the Fourth Proportional to 358,999.80, 538,499.70 and 219,031.80

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Solution

The fourth proportional to 358,999.80, 538,499.70 and 219,031.80 is: 328,547.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,999.80 : 538,499.70 = 219,031.80 : x
  2. Step 2: Convert to fraction form
    358,999.80/538,499.70 = 219,031.80/x
  3. Step 3: Cross multiply
    358,999.80x = 538,499.70 × 219,031.80
  4. Step 4: Simplify right side
    358,999.80x = 117,948,558,590.46
  5. Step 5: Solve for x
    x = 117,948,558,590.46/358,999.80
  6. Step 6: Final answer
    x = 328,547.70

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Similar ratio
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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.