Home / 645,162.80-966,869.40-431,322.80

Finding the Fourth Proportional to 645,162.80, 966,869.40 and 431,322.80

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Solution

The fourth proportional to 645,162.80, 966,869.40 and 431,322.80 is: 646,399.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,162.80 : 966,869.40 = 431,322.80 : x
  2. Step 2: Convert to fraction form
    645,162.80/966,869.40 = 431,322.80/x
  3. Step 3: Cross multiply
    645,162.80x = 966,869.40 × 431,322.80
  4. Step 4: Simplify right side
    645,162.80x = 417,032,816,842.32
  5. Step 5: Solve for x
    x = 417,032,816,842.32/645,162.80
  6. Step 6: Final answer
    x = 646,399.35

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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.