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Finding the Fourth Proportional to 388,903.60, 583,258.20 and 148,965.40

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Solution

The fourth proportional to 388,903.60, 583,258.20 and 148,965.40 is: 223,410.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,903.60 : 583,258.20 = 148,965.40 : x
  2. Step 2: Convert to fraction form
    388,903.60/583,258.20 = 148,965.40/x
  3. Step 3: Cross multiply
    388,903.60x = 583,258.20 × 148,965.40
  4. Step 4: Simplify right side
    388,903.60x = 86,885,291,066.28
  5. Step 5: Solve for x
    x = 86,885,291,066.28/388,903.60
  6. Step 6: Final answer
    x = 223,410.87

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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.