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Finding the Fourth Proportional to 640,131.48, 960,184.80 and 191,156.58

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Solution

The fourth proportional to 640,131.48, 960,184.80 and 191,156.58 is: 286,731.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,131.48 : 960,184.80 = 191,156.58 : x
  2. Step 2: Convert to fraction form
    640,131.48/960,184.80 = 191,156.58/x
  3. Step 3: Cross multiply
    640,131.48x = 960,184.80 × 191,156.58
  4. Step 4: Simplify right side
    640,131.48x = 183,545,642,535.98
  5. Step 5: Solve for x
    x = 183,545,642,535.98/640,131.48
  6. Step 6: Final answer
    x = 286,731.16

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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.