Home / 887,130.70-1,330,696.05-288,111.40

Finding the Fourth Proportional to 887,130.70, 1,330,696.05 and 288,111.40

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Solution

The fourth proportional to 887,130.70, 1,330,696.05 and 288,111.40 is: 432,167.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,130.70 : 1,330,696.05 = 288,111.40 : x
  2. Step 2: Convert to fraction form
    887,130.70/1,330,696.05 = 288,111.40/x
  3. Step 3: Cross multiply
    887,130.70x = 1,330,696.05 × 288,111.40
  4. Step 4: Simplify right side
    887,130.70x = 383,388,701,939.97
  5. Step 5: Solve for x
    x = 383,388,701,939.97/887,130.70
  6. Step 6: Final answer
    x = 432,167.10

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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.