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Finding the Fourth Proportional to 286,663.78, 429,995.77 and 84,259.93

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Solution

The fourth proportional to 286,663.78, 429,995.77 and 84,259.93 is: 126,389.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,663.78 : 429,995.77 = 84,259.93 : x
  2. Step 2: Convert to fraction form
    286,663.78/429,995.77 = 84,259.93/x
  3. Step 3: Cross multiply
    286,663.78x = 429,995.77 × 84,259.93
  4. Step 4: Simplify right side
    286,663.78x = 36,231,413,480.50
  5. Step 5: Solve for x
    x = 36,231,413,480.50/286,663.78
  6. Step 6: Final answer
    x = 126,389.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.