Home / 919,339.78-1,379,009.67-288,302.80

Finding the Fourth Proportional to 919,339.78, 1,379,009.67 and 288,302.80

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Solution

The fourth proportional to 919,339.78, 1,379,009.67 and 288,302.80 is: 432,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,339.78 : 1,379,009.67 = 288,302.80 : x
  2. Step 2: Convert to fraction form
    919,339.78/1,379,009.67 = 288,302.80/x
  3. Step 3: Cross multiply
    919,339.78x = 1,379,009.67 × 288,302.80
  4. Step 4: Simplify right side
    919,339.78x = 397,572,349,088.08
  5. Step 5: Solve for x
    x = 397,572,349,088.08/919,339.78
  6. Step 6: Final answer
    x = 432,454.20

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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.