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Finding the Fourth Proportional to 638,108.55, 880,595.71 and 351,638.89

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Solution

The fourth proportional to 638,108.55, 880,595.71 and 351,638.89 is: 485,264.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,108.55 : 880,595.71 = 351,638.89 : x
  2. Step 2: Convert to fraction form
    638,108.55/880,595.71 = 351,638.89/x
  3. Step 3: Cross multiply
    638,108.55x = 880,595.71 × 351,638.89
  4. Step 4: Simplify right side
    638,108.55x = 309,651,697,124.07
  5. Step 5: Solve for x
    x = 309,651,697,124.07/638,108.55
  6. Step 6: Final answer
    x = 485,264.92

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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.