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Finding the Fourth Proportional to 645,991.61, 891,459.72 and 359,511.62

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Solution

The fourth proportional to 645,991.61, 891,459.72 and 359,511.62 is: 496,121.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,991.61 : 891,459.72 = 359,511.62 : x
  2. Step 2: Convert to fraction form
    645,991.61/891,459.72 = 359,511.62/x
  3. Step 3: Cross multiply
    645,991.61x = 891,459.72 × 359,511.62
  4. Step 4: Simplify right side
    645,991.61x = 320,490,128,101.95
  5. Step 5: Solve for x
    x = 320,490,128,101.95/645,991.61
  6. Step 6: Final answer
    x = 496,121.19

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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.