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Finding the Fourth Proportional to 612,784.80, 843,901.20 and 442,749.60

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Solution

The fourth proportional to 612,784.80, 843,901.20 and 442,749.60 is: 609,735.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,784.80 : 843,901.20 = 442,749.60 : x
  2. Step 2: Convert to fraction form
    612,784.80/843,901.20 = 442,749.60/x
  3. Step 3: Cross multiply
    612,784.80x = 843,901.20 × 442,749.60
  4. Step 4: Simplify right side
    612,784.80x = 373,636,918,739.52
  5. Step 5: Solve for x
    x = 373,636,918,739.52/612,784.80
  6. Step 6: Final answer
    x = 609,735.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.