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Finding the Fourth Proportional to 198,686.40, 298,000.80 and 58,430.40

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Solution

The fourth proportional to 198,686.40, 298,000.80 and 58,430.40 is: 87,637.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,686.40 : 298,000.80 = 58,430.40 : x
  2. Step 2: Convert to fraction form
    198,686.40/298,000.80 = 58,430.40/x
  3. Step 3: Cross multiply
    198,686.40x = 298,000.80 × 58,430.40
  4. Step 4: Simplify right side
    198,686.40x = 17,412,305,944.32
  5. Step 5: Solve for x
    x = 17,412,305,944.32/198,686.40
  6. Step 6: Final answer
    x = 87,637.13

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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.