Home / 918,009.80-1,377,014.70-286,987.40

Finding the Fourth Proportional to 918,009.80, 1,377,014.70 and 286,987.40

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Solution

The fourth proportional to 918,009.80, 1,377,014.70 and 286,987.40 is: 430,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,009.80 : 1,377,014.70 = 286,987.40 : x
  2. Step 2: Convert to fraction form
    918,009.80/1,377,014.70 = 286,987.40/x
  3. Step 3: Cross multiply
    918,009.80x = 1,377,014.70 × 286,987.40
  4. Step 4: Simplify right side
    918,009.80x = 395,185,868,514.78
  5. Step 5: Solve for x
    x = 395,185,868,514.78/918,009.80
  6. Step 6: Final answer
    x = 430,481.10

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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.