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Finding the Fourth Proportional to 641,415.60, 885,089.52 and 354,895.92

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Solution

The fourth proportional to 641,415.60, 885,089.52 and 354,895.92 is: 489,720.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,415.60 : 885,089.52 = 354,895.92 : x
  2. Step 2: Convert to fraction form
    641,415.60/885,089.52 = 354,895.92/x
  3. Step 3: Cross multiply
    641,415.60x = 885,089.52 × 354,895.92
  4. Step 4: Simplify right side
    641,415.60x = 314,114,659,482.76
  5. Step 5: Solve for x
    x = 314,114,659,482.76/641,415.60
  6. Step 6: Final answer
    x = 489,720.95

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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.