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Finding the Fourth Proportional to 390,007.60, 585,066.76 and 120,157.64

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Solution

The fourth proportional to 390,007.60, 585,066.76 and 120,157.64 is: 180,253.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,007.60 : 585,066.76 = 120,157.64 : x
  2. Step 2: Convert to fraction form
    390,007.60/585,066.76 = 120,157.64/x
  3. Step 3: Cross multiply
    390,007.60x = 585,066.76 × 120,157.64
  4. Step 4: Simplify right side
    390,007.60x = 70,300,241,124.05
  5. Step 5: Solve for x
    x = 70,300,241,124.05/390,007.60
  6. Step 6: Final answer
    x = 180,253.52

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1.5x scale

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.