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Finding the Fourth Proportional to 561,688.08, 774,897.48 and 392,021.52

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Solution

The fourth proportional to 561,688.08, 774,897.48 and 392,021.52 is: 540,827.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,688.08 : 774,897.48 = 392,021.52 : x
  2. Step 2: Convert to fraction form
    561,688.08/774,897.48 = 392,021.52/x
  3. Step 3: Cross multiply
    561,688.08x = 774,897.48 × 392,021.52
  4. Step 4: Simplify right side
    561,688.08x = 303,776,487,953.77
  5. Step 5: Solve for x
    x = 303,776,487,953.77/561,688.08
  6. Step 6: Final answer
    x = 540,827.73

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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.