Home / 874,897.20-1,312,345.80-313,858.80

Finding the Fourth Proportional to 874,897.20, 1,312,345.80 and 313,858.80

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Solution

The fourth proportional to 874,897.20, 1,312,345.80 and 313,858.80 is: 470,788.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,897.20 : 1,312,345.80 = 313,858.80 : x
  2. Step 2: Convert to fraction form
    874,897.20/1,312,345.80 = 313,858.80/x
  3. Step 3: Cross multiply
    874,897.20x = 1,312,345.80 × 313,858.80
  4. Step 4: Simplify right side
    874,897.20x = 411,891,277,973.04
  5. Step 5: Solve for x
    x = 411,891,277,973.04/874,897.20
  6. Step 6: Final answer
    x = 470,788.20

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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.