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Finding the Fourth Proportional to 279,482.90, 385,686.45 and 152,158.50

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Solution

The fourth proportional to 279,482.90, 385,686.45 and 152,158.50 is: 209,978.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,482.90 : 385,686.45 = 152,158.50 : x
  2. Step 2: Convert to fraction form
    279,482.90/385,686.45 = 152,158.50/x
  3. Step 3: Cross multiply
    279,482.90x = 385,686.45 × 152,158.50
  4. Step 4: Simplify right side
    279,482.90x = 58,685,471,702.33
  5. Step 5: Solve for x
    x = 58,685,471,702.33/279,482.90
  6. Step 6: Final answer
    x = 209,978.76

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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.