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Finding the Fourth Proportional to 717,985.52, 990,775.48 and 395,677.60

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Solution

The fourth proportional to 717,985.52, 990,775.48 and 395,677.60 is: 546,010.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,985.52 : 990,775.48 = 395,677.60 : x
  2. Step 2: Convert to fraction form
    717,985.52/990,775.48 = 395,677.60/x
  3. Step 3: Cross multiply
    717,985.52x = 990,775.48 × 395,677.60
  4. Step 4: Simplify right side
    717,985.52x = 392,027,664,065.25
  5. Step 5: Solve for x
    x = 392,027,664,065.25/717,985.52
  6. Step 6: Final answer
    x = 546,010.54

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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.