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Finding the Fourth Proportional to 479,301.30, 718,077.15 and 390,071.70

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Solution

The fourth proportional to 479,301.30, 718,077.15 and 390,071.70 is: 584,395.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,301.30 : 718,077.15 = 390,071.70 : x
  2. Step 2: Convert to fraction form
    479,301.30/718,077.15 = 390,071.70/x
  3. Step 3: Cross multiply
    479,301.30x = 718,077.15 × 390,071.70
  4. Step 4: Simplify right side
    479,301.30x = 280,101,574,631.66
  5. Step 5: Solve for x
    x = 280,101,574,631.66/479,301.30
  6. Step 6: Final answer
    x = 584,395.61

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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.