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Finding the Fourth Proportional to 666,706.51, 920,057.40 and 360,782.85

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Solution

The fourth proportional to 666,706.51, 920,057.40 and 360,782.85 is: 497,881.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,706.51 : 920,057.40 = 360,782.85 : x
  2. Step 2: Convert to fraction form
    666,706.51/920,057.40 = 360,782.85/x
  3. Step 3: Cross multiply
    666,706.51x = 920,057.40 × 360,782.85
  4. Step 4: Simplify right side
    666,706.51x = 331,940,930,935.59
  5. Step 5: Solve for x
    x = 331,940,930,935.59/666,706.51
  6. Step 6: Final answer
    x = 497,881.64

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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.