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Finding the Fourth Proportional to 390,783.60, 586,164.40 and 124,560.08

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Solution

The fourth proportional to 390,783.60, 586,164.40 and 124,560.08 is: 186,836.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,783.60 : 586,164.40 = 124,560.08 : x
  2. Step 2: Convert to fraction form
    390,783.60/586,164.40 = 124,560.08/x
  3. Step 3: Cross multiply
    390,783.60x = 586,164.40 × 124,560.08
  4. Step 4: Simplify right side
    390,783.60x = 73,012,684,557.15
  5. Step 5: Solve for x
    x = 73,012,684,557.15/390,783.60
  6. Step 6: Final answer
    x = 186,836.61

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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.