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Finding the Fourth Proportional to 389,465.20, 546,038.60 and 389,465.20

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Solution

The fourth proportional to 389,465.20, 546,038.60 and 389,465.20 is: 546,038.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,465.20 : 546,038.60 = 389,465.20 : x
  2. Step 2: Convert to fraction form
    389,465.20/546,038.60 = 389,465.20/x
  3. Step 3: Cross multiply
    389,465.20x = 546,038.60 × 389,465.20
  4. Step 4: Simplify right side
    389,465.20x = 212,663,032,556.72
  5. Step 5: Solve for x
    x = 212,663,032,556.72/389,465.20
  6. Step 6: Final answer
    x = 546,038.60

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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.