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Finding the Fourth Proportional to 389,688.63, 537,712.65 and 236,647.23

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Solution

The fourth proportional to 389,688.63, 537,712.65 and 236,647.23 is: 326,538.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,688.63 : 537,712.65 = 236,647.23 : x
  2. Step 2: Convert to fraction form
    389,688.63/537,712.65 = 236,647.23/x
  3. Step 3: Cross multiply
    389,688.63x = 537,712.65 × 236,647.23
  4. Step 4: Simplify right side
    389,688.63x = 127,248,209,158.46
  5. Step 5: Solve for x
    x = 127,248,209,158.46/389,688.63
  6. Step 6: Final answer
    x = 326,538.16

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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.