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Finding the Fourth Proportional to 390,647.76, 586,058.88 and 166,015.32

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Solution

The fourth proportional to 390,647.76, 586,058.88 and 166,015.32 is: 249,060.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,647.76 : 586,058.88 = 166,015.32 : x
  2. Step 2: Convert to fraction form
    390,647.76/586,058.88 = 166,015.32/x
  3. Step 3: Cross multiply
    390,647.76x = 586,058.88 × 166,015.32
  4. Step 4: Simplify right side
    390,647.76x = 97,294,752,502.04
  5. Step 5: Solve for x
    x = 97,294,752,502.04/390,647.76
  6. Step 6: Final answer
    x = 249,060.05

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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.