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Finding the Fourth Proportional to 666,173.34, 919,619.46 and 424,780.38

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Solution

The fourth proportional to 666,173.34, 919,619.46 and 424,780.38 is: 586,388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,173.34 : 919,619.46 = 424,780.38 : x
  2. Step 2: Convert to fraction form
    666,173.34/919,619.46 = 424,780.38/x
  3. Step 3: Cross multiply
    666,173.34x = 919,619.46 × 424,780.38
  4. Step 4: Simplify right side
    666,173.34x = 390,636,303,674.20
  5. Step 5: Solve for x
    x = 390,636,303,674.20/666,173.34
  6. Step 6: Final answer
    x = 586,388.38

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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.