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Finding the Fourth Proportional to 530,708.40, 732,377.83 and 288,990.97

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Solution

The fourth proportional to 530,708.40, 732,377.83 and 288,990.97 is: 398,807.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,708.40 : 732,377.83 = 288,990.97 : x
  2. Step 2: Convert to fraction form
    530,708.40/732,377.83 = 288,990.97/x
  3. Step 3: Cross multiply
    530,708.40x = 732,377.83 × 288,990.97
  4. Step 4: Simplify right side
    530,708.40x = 211,650,579,498.20
  5. Step 5: Solve for x
    x = 211,650,579,498.20/530,708.40
  6. Step 6: Final answer
    x = 398,807.67

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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.