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Finding the Fourth Proportional to 390,679.08, 586,106.91 and 124,454.76

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Solution

The fourth proportional to 390,679.08, 586,106.91 and 124,454.76 is: 186,710.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,679.08 : 586,106.91 = 124,454.76 : x
  2. Step 2: Convert to fraction form
    390,679.08/586,106.91 = 124,454.76/x
  3. Step 3: Cross multiply
    390,679.08x = 586,106.91 × 124,454.76
  4. Step 4: Simplify right side
    390,679.08x = 72,943,794,818.39
  5. Step 5: Solve for x
    x = 72,943,794,818.39/390,679.08
  6. Step 6: Final answer
    x = 186,710.27

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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.