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Finding the Fourth Proportional to 666,785.08, 920,154 and 380,310.04

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Solution

The fourth proportional to 666,785.08, 920,154 and 380,310.04 is: 524,822.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,785.08 : 920,154 = 380,310.04 : x
  2. Step 2: Convert to fraction form
    666,785.08/920,154 = 380,310.04/x
  3. Step 3: Cross multiply
    666,785.08x = 920,154 × 380,310.04
  4. Step 4: Simplify right side
    666,785.08x = 349,943,804,546.16
  5. Step 5: Solve for x
    x = 349,943,804,546.16/666,785.08
  6. Step 6: Final answer
    x = 524,822.49

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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.