Home / 644,275.38-889,112.07-357,822.30

Finding the Fourth Proportional to 644,275.38, 889,112.07 and 357,822.30

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Solution

The fourth proportional to 644,275.38, 889,112.07 and 357,822.30 is: 493,801.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,275.38 : 889,112.07 = 357,822.30 : x
  2. Step 2: Convert to fraction form
    644,275.38/889,112.07 = 357,822.30/x
  3. Step 3: Cross multiply
    644,275.38x = 889,112.07 × 357,822.30
  4. Step 4: Simplify right side
    644,275.38x = 318,144,125,845.16
  5. Step 5: Solve for x
    x = 318,144,125,845.16/644,275.38
  6. Step 6: Final answer
    x = 493,801.46

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Double scale
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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.