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Finding the Fourth Proportional to 442,913.20, 618,678.80 and 442,913.20

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Solution

The fourth proportional to 442,913.20, 618,678.80 and 442,913.20 is: 618,678.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,913.20 : 618,678.80 = 442,913.20 : x
  2. Step 2: Convert to fraction form
    442,913.20/618,678.80 = 442,913.20/x
  3. Step 3: Cross multiply
    442,913.20x = 618,678.80 × 442,913.20
  4. Step 4: Simplify right side
    442,913.20x = 274,021,007,080.16
  5. Step 5: Solve for x
    x = 274,021,007,080.16/442,913.20
  6. Step 6: Final answer
    x = 618,678.80

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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.