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Finding the Fourth Proportional to 287,778.10, 431,663.10 and 130,006.30

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Solution

The fourth proportional to 287,778.10, 431,663.10 and 130,006.30 is: 195,007.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,778.10 : 431,663.10 = 130,006.30 : x
  2. Step 2: Convert to fraction form
    287,778.10/431,663.10 = 130,006.30/x
  3. Step 3: Cross multiply
    287,778.10x = 431,663.10 × 130,006.30
  4. Step 4: Simplify right side
    287,778.10x = 56,118,922,477.53
  5. Step 5: Solve for x
    x = 56,118,922,477.53/287,778.10
  6. Step 6: Final answer
    x = 195,007.62

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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.