Home / 645,108.88-890,280.64-358,633.75

Finding the Fourth Proportional to 645,108.88, 890,280.64 and 358,633.75

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Solution

The fourth proportional to 645,108.88, 890,280.64 and 358,633.75 is: 494,931.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,108.88 : 890,280.64 = 358,633.75 : x
  2. Step 2: Convert to fraction form
    645,108.88/890,280.64 = 358,633.75/x
  3. Step 3: Cross multiply
    645,108.88x = 890,280.64 × 358,633.75
  4. Step 4: Simplify right side
    645,108.88x = 319,284,684,475.60
  5. Step 5: Solve for x
    x = 319,284,684,475.60/645,108.88
  6. Step 6: Final answer
    x = 494,931.47

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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.