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Finding the Fourth Proportional to 640,569.04, 960,893.12 and 214,143.20

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Solution

The fourth proportional to 640,569.04, 960,893.12 and 214,143.20 is: 321,228.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,569.04 : 960,893.12 = 214,143.20 : x
  2. Step 2: Convert to fraction form
    640,569.04/960,893.12 = 214,143.20/x
  3. Step 3: Cross multiply
    640,569.04x = 960,893.12 × 214,143.20
  4. Step 4: Simplify right side
    640,569.04x = 205,768,727,574.78
  5. Step 5: Solve for x
    x = 205,768,727,574.78/640,569.04
  6. Step 6: Final answer
    x = 321,228.02

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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.