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Finding the Fourth Proportional to 492,666.98, 679,900.59 and 311,312.73

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Solution

The fourth proportional to 492,666.98, 679,900.59 and 311,312.73 is: 429,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,666.98 : 679,900.59 = 311,312.73 : x
  2. Step 2: Convert to fraction form
    492,666.98/679,900.59 = 311,312.73/x
  3. Step 3: Cross multiply
    492,666.98x = 679,900.59 × 311,312.73
  4. Step 4: Simplify right side
    492,666.98x = 211,661,708,801.51
  5. Step 5: Solve for x
    x = 211,661,708,801.51/492,666.98
  6. Step 6: Final answer
    x = 429,624.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.