Home / 645,909.15-891,512.83-500,427.18

Finding the Fourth Proportional to 645,909.15, 891,512.83 and 500,427.18

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Solution

The fourth proportional to 645,909.15, 891,512.83 and 500,427.18 is: 690,712.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,909.15 : 891,512.83 = 500,427.18 : x
  2. Step 2: Convert to fraction form
    645,909.15/891,512.83 = 500,427.18/x
  3. Step 3: Cross multiply
    645,909.15x = 891,512.83 × 500,427.18
  4. Step 4: Simplify right side
    645,909.15x = 446,137,250,199.65
  5. Step 5: Solve for x
    x = 446,137,250,199.65/645,909.15
  6. Step 6: Final answer
    x = 690,712.08

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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.