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Finding the Fourth Proportional to 389,866.47, 585,032.98 and 358,140.39

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Solution

The fourth proportional to 389,866.47, 585,032.98 and 358,140.39 is: 537,424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,866.47 : 585,032.98 = 358,140.39 : x
  2. Step 2: Convert to fraction form
    389,866.47/585,032.98 = 358,140.39/x
  3. Step 3: Cross multiply
    389,866.47x = 585,032.98 × 358,140.39
  4. Step 4: Simplify right side
    389,866.47x = 209,523,939,620.06
  5. Step 5: Solve for x
    x = 209,523,939,620.06/389,866.47
  6. Step 6: Final answer
    x = 537,424.88

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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.