Home / 645,945.88-891,444.62-359,465.96

Finding the Fourth Proportional to 645,945.88, 891,444.62 and 359,465.96

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Solution

The fourth proportional to 645,945.88, 891,444.62 and 359,465.96 is: 496,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,945.88 : 891,444.62 = 359,465.96 : x
  2. Step 2: Convert to fraction form
    645,945.88/891,444.62 = 359,465.96/x
  3. Step 3: Cross multiply
    645,945.88x = 891,444.62 × 359,465.96
  4. Step 4: Simplify right side
    645,945.88x = 320,443,997,220.42
  5. Step 5: Solve for x
    x = 320,443,997,220.42/645,945.88
  6. Step 6: Final answer
    x = 496,084.90

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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.