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Finding the Fourth Proportional to 644,283.16, 889,555.56 and 402,674.33

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Solution

The fourth proportional to 644,283.16, 889,555.56 and 402,674.33 is: 555,968.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,283.16 : 889,555.56 = 402,674.33 : x
  2. Step 2: Convert to fraction form
    644,283.16/889,555.56 = 402,674.33/x
  3. Step 3: Cross multiply
    644,283.16x = 889,555.56 × 402,674.33
  4. Step 4: Simplify right side
    644,283.16x = 358,201,189,120.78
  5. Step 5: Solve for x
    x = 358,201,189,120.78/644,283.16
  6. Step 6: Final answer
    x = 555,968.57

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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.