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Finding the Fourth Proportional to 661,234.86, 912,603.90 and 403,261.50

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Solution

The fourth proportional to 661,234.86, 912,603.90 and 403,261.50 is: 556,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,234.86 : 912,603.90 = 403,261.50 : x
  2. Step 2: Convert to fraction form
    661,234.86/912,603.90 = 403,261.50/x
  3. Step 3: Cross multiply
    661,234.86x = 912,603.90 × 403,261.50
  4. Step 4: Simplify right side
    661,234.86x = 368,018,017,619.85
  5. Step 5: Solve for x
    x = 368,018,017,619.85/661,234.86
  6. Step 6: Final answer
    x = 556,561.73

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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.