Home / 390,384.02-585,432.59-134,143.92

Finding the Fourth Proportional to 390,384.02, 585,432.59 and 134,143.92

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Solution

The fourth proportional to 390,384.02, 585,432.59 and 134,143.92 is: 201,166.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,384.02 : 585,432.59 = 134,143.92 : x
  2. Step 2: Convert to fraction form
    390,384.02/585,432.59 = 134,143.92/x
  3. Step 3: Cross multiply
    390,384.02x = 585,432.59 × 134,143.92
  4. Step 4: Simplify right side
    390,384.02x = 78,532,222,518.35
  5. Step 5: Solve for x
    x = 78,532,222,518.35/390,384.02
  6. Step 6: Final answer
    x = 201,166.59

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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.