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Finding the Fourth Proportional to 492,235.59, 679,339.90 and 310,938.78

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Solution

The fourth proportional to 492,235.59, 679,339.90 and 310,938.78 is: 429,130.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,235.59 : 679,339.90 = 310,938.78 : x
  2. Step 2: Convert to fraction form
    492,235.59/679,339.90 = 310,938.78/x
  3. Step 3: Cross multiply
    492,235.59x = 679,339.90 × 310,938.78
  4. Step 4: Simplify right side
    492,235.59x = 211,233,118,156.63
  5. Step 5: Solve for x
    x = 211,233,118,156.63/492,235.59
  6. Step 6: Final answer
    x = 429,130.12

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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.