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Finding the Fourth Proportional to 286,005.78, 394,688.03 and 158,681.07

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Solution

The fourth proportional to 286,005.78, 394,688.03 and 158,681.07 is: 218,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,005.78 : 394,688.03 = 158,681.07 : x
  2. Step 2: Convert to fraction form
    286,005.78/394,688.03 = 158,681.07/x
  3. Step 3: Cross multiply
    286,005.78x = 394,688.03 × 158,681.07
  4. Step 4: Simplify right side
    286,005.78x = 62,629,518,123.19
  5. Step 5: Solve for x
    x = 62,629,518,123.19/286,005.78
  6. Step 6: Final answer
    x = 218,979.90

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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.