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Finding the Fourth Proportional to 645,257.70, 890,452.71 and 358,760.70

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Solution

The fourth proportional to 645,257.70, 890,452.71 and 358,760.70 is: 495,088.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,257.70 : 890,452.71 = 358,760.70 : x
  2. Step 2: Convert to fraction form
    645,257.70/890,452.71 = 358,760.70/x
  3. Step 3: Cross multiply
    645,257.70x = 890,452.71 × 358,760.70
  4. Step 4: Simplify right side
    645,257.70x = 319,459,437,556.50
  5. Step 5: Solve for x
    x = 319,459,437,556.50/645,257.70
  6. Step 6: Final answer
    x = 495,088.14

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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.