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Finding the Fourth Proportional to 868,686.18, 1,198,798.74 and 486,704.76

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Solution

The fourth proportional to 868,686.18, 1,198,798.74 and 486,704.76 is: 671,659.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,686.18 : 1,198,798.74 = 486,704.76 : x
  2. Step 2: Convert to fraction form
    868,686.18/1,198,798.74 = 486,704.76/x
  3. Step 3: Cross multiply
    868,686.18x = 1,198,798.74 × 486,704.76
  4. Step 4: Simplify right side
    868,686.18x = 583,461,053,040.00
  5. Step 5: Solve for x
    x = 583,461,053,040.00/868,686.18
  6. Step 6: Final answer
    x = 671,659.19

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Double scale
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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.