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Finding the Fourth Proportional to 665,354.10, 918,189.47 and 359,430.47

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Solution

The fourth proportional to 665,354.10, 918,189.47 and 359,430.47 is: 496,014.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,354.10 : 918,189.47 = 359,430.47 : x
  2. Step 2: Convert to fraction form
    665,354.10/918,189.47 = 359,430.47/x
  3. Step 3: Cross multiply
    665,354.10x = 918,189.47 × 359,430.47
  4. Step 4: Simplify right side
    665,354.10x = 330,025,272,751.15
  5. Step 5: Solve for x
    x = 330,025,272,751.15/665,354.10
  6. Step 6: Final answer
    x = 496,014.49

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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.