Home / 1,312,752.40-1,969,128.60-315,480.40

Finding the Fourth Proportional to 1,312,752.40, 1,969,128.60 and 315,480.40

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Solution

The fourth proportional to 1,312,752.40, 1,969,128.60 and 315,480.40 is: 473,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,752.40 : 1,969,128.60 = 315,480.40 : x
  2. Step 2: Convert to fraction form
    1,312,752.40/1,969,128.60 = 315,480.40/x
  3. Step 3: Cross multiply
    1,312,752.40x = 1,969,128.60 × 315,480.40
  4. Step 4: Simplify right side
    1,312,752.40x = 621,221,478,379.44
  5. Step 5: Solve for x
    x = 621,221,478,379.44/1,312,752.40
  6. Step 6: Final answer
    x = 473,220.60

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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.