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Finding the Fourth Proportional to 564,003.39, 778,320.45 and 309,352.76

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Solution

The fourth proportional to 564,003.39, 778,320.45 and 309,352.76 is: 426,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,003.39 : 778,320.45 = 309,352.76 : x
  2. Step 2: Convert to fraction form
    564,003.39/778,320.45 = 309,352.76/x
  3. Step 3: Cross multiply
    564,003.39x = 778,320.45 × 309,352.76
  4. Step 4: Simplify right side
    564,003.39x = 240,775,575,480.34
  5. Step 5: Solve for x
    x = 240,775,575,480.34/564,003.39
  6. Step 6: Final answer
    x = 426,904.48

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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.