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Finding the Fourth Proportional to 389,477.20, 546,055.40 and 389,477.20

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Solution

The fourth proportional to 389,477.20, 546,055.40 and 389,477.20 is: 546,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,477.20 : 546,055.40 = 389,477.20 : x
  2. Step 2: Convert to fraction form
    389,477.20/546,055.40 = 389,477.20/x
  3. Step 3: Cross multiply
    389,477.20x = 546,055.40 × 389,477.20
  4. Step 4: Simplify right side
    389,477.20x = 212,676,128,236.88
  5. Step 5: Solve for x
    x = 212,676,128,236.88/389,477.20
  6. Step 6: Final answer
    x = 546,055.40

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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.