Home / 287,124.28-430,653.61-76,778.62

Finding the Fourth Proportional to 287,124.28, 430,653.61 and 76,778.62

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Solution

The fourth proportional to 287,124.28, 430,653.61 and 76,778.62 is: 115,159.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,124.28 : 430,653.61 = 76,778.62 : x
  2. Step 2: Convert to fraction form
    287,124.28/430,653.61 = 76,778.62/x
  3. Step 3: Cross multiply
    287,124.28x = 430,653.61 × 76,778.62
  4. Step 4: Simplify right side
    287,124.28x = 33,064,988,893.16
  5. Step 5: Solve for x
    x = 33,064,988,893.16/287,124.28
  6. Step 6: Final answer
    x = 115,159.15

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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.