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Finding the Fourth Proportional to 666,722.68, 920,077.28 and 360,799.06

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Solution

The fourth proportional to 666,722.68, 920,077.28 and 360,799.06 is: 497,902.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,722.68 : 920,077.28 = 360,799.06 : x
  2. Step 2: Convert to fraction form
    666,722.68/920,077.28 = 360,799.06/x
  3. Step 3: Cross multiply
    666,722.68x = 920,077.28 × 360,799.06
  4. Step 4: Simplify right side
    666,722.68x = 331,963,017,751.36
  5. Step 5: Solve for x
    x = 331,963,017,751.36/666,722.68
  6. Step 6: Final answer
    x = 497,902.69

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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.