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Finding the Fourth Proportional to 556,005.78, 767,279.64 and 314,279.85

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Solution

The fourth proportional to 556,005.78, 767,279.64 and 314,279.85 is: 433,701.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,005.78 : 767,279.64 = 314,279.85 : x
  2. Step 2: Convert to fraction form
    556,005.78/767,279.64 = 314,279.85/x
  3. Step 3: Cross multiply
    556,005.78x = 767,279.64 × 314,279.85
  4. Step 4: Simplify right side
    556,005.78x = 241,140,530,167.25
  5. Step 5: Solve for x
    x = 241,140,530,167.25/556,005.78
  6. Step 6: Final answer
    x = 433,701.48

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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.