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Finding the Fourth Proportional to 658,010.40, 987,476.40 and 421,927.20

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Solution

The fourth proportional to 658,010.40, 987,476.40 and 421,927.20 is: 633,186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,010.40 : 987,476.40 = 421,927.20 : x
  2. Step 2: Convert to fraction form
    658,010.40/987,476.40 = 421,927.20/x
  3. Step 3: Cross multiply
    658,010.40x = 987,476.40 × 421,927.20
  4. Step 4: Simplify right side
    658,010.40x = 416,643,152,518.08
  5. Step 5: Solve for x
    x = 416,643,152,518.08/658,010.40
  6. Step 6: Final answer
    x = 633,186.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.