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Finding the Fourth Proportional to 279,686.34, 385,969.80 and 158,830.14

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Solution

The fourth proportional to 279,686.34, 385,969.80 and 158,830.14 is: 219,187.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,686.34 : 385,969.80 = 158,830.14 : x
  2. Step 2: Convert to fraction form
    279,686.34/385,969.80 = 158,830.14/x
  3. Step 3: Cross multiply
    279,686.34x = 385,969.80 × 158,830.14
  4. Step 4: Simplify right side
    279,686.34x = 61,303,637,369.77
  5. Step 5: Solve for x
    x = 61,303,637,369.77/279,686.34
  6. Step 6: Final answer
    x = 219,187.10

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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.