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Finding the Fourth Proportional to 390,561.60, 548,030.40 and 390,561.60

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Solution

The fourth proportional to 390,561.60, 548,030.40 and 390,561.60 is: 548,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,561.60 : 548,030.40 = 390,561.60 : x
  2. Step 2: Convert to fraction form
    390,561.60/548,030.40 = 390,561.60/x
  3. Step 3: Cross multiply
    390,561.60x = 548,030.40 × 390,561.60
  4. Step 4: Simplify right side
    390,561.60x = 214,039,629,872.64
  5. Step 5: Solve for x
    x = 214,039,629,872.64/390,561.60
  6. Step 6: Final answer
    x = 548,030.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.