Home / 938,420.60-1,406,385.20-489,020.80

Finding the Fourth Proportional to 938,420.60, 1,406,385.20 and 489,020.80

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Solution

The fourth proportional to 938,420.60, 1,406,385.20 and 489,020.80 is: 732,882.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,420.60 : 1,406,385.20 = 489,020.80 : x
  2. Step 2: Convert to fraction form
    938,420.60/1,406,385.20 = 489,020.80/x
  3. Step 3: Cross multiply
    938,420.60x = 1,406,385.20 × 489,020.80
  4. Step 4: Simplify right side
    938,420.60x = 687,751,615,612.16
  5. Step 5: Solve for x
    x = 687,751,615,612.16/938,420.60
  6. Step 6: Final answer
    x = 732,882.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.