Home / 387,421.46-581,138.02-147,548.62

Finding the Fourth Proportional to 387,421.46, 581,138.02 and 147,548.62

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Solution

The fourth proportional to 387,421.46, 581,138.02 and 147,548.62 is: 221,325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,421.46 : 581,138.02 = 147,548.62 : x
  2. Step 2: Convert to fraction form
    387,421.46/581,138.02 = 147,548.62/x
  3. Step 3: Cross multiply
    387,421.46x = 581,138.02 × 147,548.62
  4. Step 4: Simplify right side
    387,421.46x = 85,746,111,058.82
  5. Step 5: Solve for x
    x = 85,746,111,058.82/387,421.46
  6. Step 6: Final answer
    x = 221,325.15

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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.