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Finding the Fourth Proportional to 644,798.23, 889,545.48 and 402,660.47

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Solution

The fourth proportional to 644,798.23, 889,545.48 and 402,660.47 is: 555,499.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,798.23 : 889,545.48 = 402,660.47 : x
  2. Step 2: Convert to fraction form
    644,798.23/889,545.48 = 402,660.47/x
  3. Step 3: Cross multiply
    644,798.23x = 889,545.48 × 402,660.47
  4. Step 4: Simplify right side
    644,798.23x = 358,184,801,777.06
  5. Step 5: Solve for x
    x = 358,184,801,777.06/644,798.23
  6. Step 6: Final answer
    x = 555,499.05

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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.