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Finding the Fourth Proportional to 660,999.90, 912,345.75 and 374,690.82

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Solution

The fourth proportional to 660,999.90, 912,345.75 and 374,690.82 is: 517,167.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,999.90 : 912,345.75 = 374,690.82 : x
  2. Step 2: Convert to fraction form
    660,999.90/912,345.75 = 374,690.82/x
  3. Step 3: Cross multiply
    660,999.90x = 912,345.75 × 374,690.82
  4. Step 4: Simplify right side
    660,999.90x = 341,847,577,191.02
  5. Step 5: Solve for x
    x = 341,847,577,191.02/660,999.90
  6. Step 6: Final answer
    x = 517,167.37

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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.