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Finding the Fourth Proportional to 389,440.10, 546,690.70 and 389,440.10

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Solution

The fourth proportional to 389,440.10, 546,690.70 and 389,440.10 is: 546,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,440.10 : 546,690.70 = 389,440.10 : x
  2. Step 2: Convert to fraction form
    389,440.10/546,690.70 = 389,440.10/x
  3. Step 3: Cross multiply
    389,440.10x = 546,690.70 × 389,440.10
  4. Step 4: Simplify right side
    389,440.10x = 212,903,280,877.07
  5. Step 5: Solve for x
    x = 212,903,280,877.07/389,440.10
  6. Step 6: Final answer
    x = 546,690.70

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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.