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Finding the Fourth Proportional to 561,432.88, 774,779.37 and 306,784.07

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Solution

The fourth proportional to 561,432.88, 774,779.37 and 306,784.07 is: 423,363.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,432.88 : 774,779.37 = 306,784.07 : x
  2. Step 2: Convert to fraction form
    561,432.88/774,779.37 = 306,784.07/x
  3. Step 3: Cross multiply
    561,432.88x = 774,779.37 × 306,784.07
  4. Step 4: Simplify right side
    561,432.88x = 237,689,968,480.64
  5. Step 5: Solve for x
    x = 237,689,968,480.64/561,432.88
  6. Step 6: Final answer
    x = 423,363.11

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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.