Home / 645,379.80-890,537.74-358,844.73

Finding the Fourth Proportional to 645,379.80, 890,537.74 and 358,844.73

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Solution

The fourth proportional to 645,379.80, 890,537.74 and 358,844.73 is: 495,157.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,379.80 : 890,537.74 = 358,844.73 : x
  2. Step 2: Convert to fraction form
    645,379.80/890,537.74 = 358,844.73/x
  3. Step 3: Cross multiply
    645,379.80x = 890,537.74 × 358,844.73
  4. Step 4: Simplify right side
    645,379.80x = 319,564,773,968.00
  5. Step 5: Solve for x
    x = 319,564,773,968.00/645,379.80
  6. Step 6: Final answer
    x = 495,157.69

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Double scale
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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.