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Finding the Fourth Proportional to 612,431.36, 918,587.64 and 185,970.88

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Solution

The fourth proportional to 612,431.36, 918,587.64 and 185,970.88 is: 278,938.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,431.36 : 918,587.64 = 185,970.88 : x
  2. Step 2: Convert to fraction form
    612,431.36/918,587.64 = 185,970.88/x
  3. Step 3: Cross multiply
    612,431.36x = 918,587.64 × 185,970.88
  4. Step 4: Simplify right side
    612,431.36x = 170,830,549,471.45
  5. Step 5: Solve for x
    x = 170,830,549,471.45/612,431.36
  6. Step 6: Final answer
    x = 278,938.28

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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.