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Finding the Fourth Proportional to 666,695.51, 920,055.55 and 380,209.44

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Solution

The fourth proportional to 666,695.51, 920,055.55 and 380,209.44 is: 524,698.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,695.51 : 920,055.55 = 380,209.44 : x
  2. Step 2: Convert to fraction form
    666,695.51/920,055.55 = 380,209.44/x
  3. Step 3: Cross multiply
    666,695.51x = 920,055.55 × 380,209.44
  4. Step 4: Simplify right side
    666,695.51x = 349,813,805,434.39
  5. Step 5: Solve for x
    x = 349,813,805,434.39/666,695.51
  6. Step 6: Final answer
    x = 524,698.01

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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.