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Finding the Fourth Proportional to 459,037.80, 688,556.70 and 319,069.80

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Solution

The fourth proportional to 459,037.80, 688,556.70 and 319,069.80 is: 478,604.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,037.80 : 688,556.70 = 319,069.80 : x
  2. Step 2: Convert to fraction form
    459,037.80/688,556.70 = 319,069.80/x
  3. Step 3: Cross multiply
    459,037.80x = 688,556.70 × 319,069.80
  4. Step 4: Simplify right side
    459,037.80x = 219,697,648,557.66
  5. Step 5: Solve for x
    x = 219,697,648,557.66/459,037.80
  6. Step 6: Final answer
    x = 478,604.70

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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.