Home / 438,128.72-604,387.77-380,638.87

Finding the Fourth Proportional to 438,128.72, 604,387.77 and 380,638.87

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Solution

The fourth proportional to 438,128.72, 604,387.77 and 380,638.87 is: 525,081.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,128.72 : 604,387.77 = 380,638.87 : x
  2. Step 2: Convert to fraction form
    438,128.72/604,387.77 = 380,638.87/x
  3. Step 3: Cross multiply
    438,128.72x = 604,387.77 × 380,638.87
  4. Step 4: Simplify right side
    438,128.72x = 230,053,476,303.65
  5. Step 5: Solve for x
    x = 230,053,476,303.65/438,128.72
  6. Step 6: Final answer
    x = 525,081.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.