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Finding the Fourth Proportional to 554,452.61, 765,112.88 and 312,720.77

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Solution

The fourth proportional to 554,452.61, 765,112.88 and 312,720.77 is: 431,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,452.61 : 765,112.88 = 312,720.77 : x
  2. Step 2: Convert to fraction form
    554,452.61/765,112.88 = 312,720.77/x
  3. Step 3: Cross multiply
    554,452.61x = 765,112.88 × 312,720.77
  4. Step 4: Simplify right side
    554,452.61x = 239,266,683,581.35
  5. Step 5: Solve for x
    x = 239,266,683,581.35/554,452.61
  6. Step 6: Final answer
    x = 431,536.77

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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.