Home / 646,257.60-891,705.18-391,460.76

Finding the Fourth Proportional to 646,257.60, 891,705.18 and 391,460.76

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Solution

The fourth proportional to 646,257.60, 891,705.18 and 391,460.76 is: 540,136.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,257.60 : 891,705.18 = 391,460.76 : x
  2. Step 2: Convert to fraction form
    646,257.60/891,705.18 = 391,460.76/x
  3. Step 3: Cross multiply
    646,257.60x = 891,705.18 × 391,460.76
  4. Step 4: Simplify right side
    646,257.60x = 349,067,587,458.74
  5. Step 5: Solve for x
    x = 349,067,587,458.74/646,257.60
  6. Step 6: Final answer
    x = 540,136.92

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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.