Home / 645,170.80-966,881.40-431,330.80

Finding the Fourth Proportional to 645,170.80, 966,881.40 and 431,330.80

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Solution

The fourth proportional to 645,170.80, 966,881.40 and 431,330.80 is: 646,411.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,170.80 : 966,881.40 = 431,330.80 : x
  2. Step 2: Convert to fraction form
    645,170.80/966,881.40 = 431,330.80/x
  3. Step 3: Cross multiply
    645,170.80x = 966,881.40 × 431,330.80
  4. Step 4: Simplify right side
    645,170.80x = 417,045,727,767.12
  5. Step 5: Solve for x
    x = 417,045,727,767.12/645,170.80
  6. Step 6: Final answer
    x = 646,411.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.