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Finding the Fourth Proportional to 529,420.90, 730,598.44 and 287,698.90

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Solution

The fourth proportional to 529,420.90, 730,598.44 and 287,698.90 is: 397,023.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,420.90 : 730,598.44 = 287,698.90 : x
  2. Step 2: Convert to fraction form
    529,420.90/730,598.44 = 287,698.90/x
  3. Step 3: Cross multiply
    529,420.90x = 730,598.44 × 287,698.90
  4. Step 4: Simplify right side
    529,420.90x = 210,192,362,438.23
  5. Step 5: Solve for x
    x = 210,192,362,438.23/529,420.90
  6. Step 6: Final answer
    x = 397,023.17

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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.