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Finding the Fourth Proportional to 660,136.11, 910,988.82 and 358,330.11

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Solution

The fourth proportional to 660,136.11, 910,988.82 and 358,330.11 is: 494,496.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,136.11 : 910,988.82 = 358,330.11 : x
  2. Step 2: Convert to fraction form
    660,136.11/910,988.82 = 358,330.11/x
  3. Step 3: Cross multiply
    660,136.11x = 910,988.82 × 358,330.11
  4. Step 4: Simplify right side
    660,136.11x = 326,434,724,079.37
  5. Step 5: Solve for x
    x = 326,434,724,079.37/660,136.11
  6. Step 6: Final answer
    x = 494,496.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.