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Finding the Fourth Proportional to 620,129.85, 855,726.71 and 348,176.40

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Solution

The fourth proportional to 620,129.85, 855,726.71 and 348,176.40 is: 480,453.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,129.85 : 855,726.71 = 348,176.40 : x
  2. Step 2: Convert to fraction form
    620,129.85/855,726.71 = 348,176.40/x
  3. Step 3: Cross multiply
    620,129.85x = 855,726.71 × 348,176.40
  4. Step 4: Simplify right side
    620,129.85x = 297,943,843,530.76
  5. Step 5: Solve for x
    x = 297,943,843,530.76/620,129.85
  6. Step 6: Final answer
    x = 480,453.96

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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.