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Finding the Fourth Proportional to 645,643.70, 904,834.30 and 645,643.70

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Solution

The fourth proportional to 645,643.70, 904,834.30 and 645,643.70 is: 904,834.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,643.70 : 904,834.30 = 645,643.70 : x
  2. Step 2: Convert to fraction form
    645,643.70/904,834.30 = 645,643.70/x
  3. Step 3: Cross multiply
    645,643.70x = 904,834.30 × 645,643.70
  4. Step 4: Simplify right side
    645,643.70x = 584,200,565,338.91
  5. Step 5: Solve for x
    x = 584,200,565,338.91/645,643.70
  6. Step 6: Final answer
    x = 904,834.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.