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Finding the Fourth Proportional to 868,987.80, 1,303,481.70 and 371,323.80

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Solution

The fourth proportional to 868,987.80, 1,303,481.70 and 371,323.80 is: 556,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,987.80 : 1,303,481.70 = 371,323.80 : x
  2. Step 2: Convert to fraction form
    868,987.80/1,303,481.70 = 371,323.80/x
  3. Step 3: Cross multiply
    868,987.80x = 1,303,481.70 × 371,323.80
  4. Step 4: Simplify right side
    868,987.80x = 484,013,778,074.46
  5. Step 5: Solve for x
    x = 484,013,778,074.46/868,987.80
  6. Step 6: Final answer
    x = 556,985.70

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Double scale
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Similar ratio
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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.