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Finding the Fourth Proportional to 529,686.55, 730,970.36 and 311,904.69

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Solution

The fourth proportional to 529,686.55, 730,970.36 and 311,904.69 is: 430,430.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,686.55 : 730,970.36 = 311,904.69 : x
  2. Step 2: Convert to fraction form
    529,686.55/730,970.36 = 311,904.69/x
  3. Step 3: Cross multiply
    529,686.55x = 730,970.36 × 311,904.69
  4. Step 4: Simplify right side
    529,686.55x = 227,993,083,534.99
  5. Step 5: Solve for x
    x = 227,993,083,534.99/529,686.55
  6. Step 6: Final answer
    x = 430,430.19

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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.