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Finding the Fourth Proportional to 666,762.55, 920,135.25 and 360,838.98

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Solution

The fourth proportional to 666,762.55, 920,135.25 and 360,838.98 is: 497,959.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,762.55 : 920,135.25 = 360,838.98 : x
  2. Step 2: Convert to fraction form
    666,762.55/920,135.25 = 360,838.98/x
  3. Step 3: Cross multiply
    666,762.55x = 920,135.25 × 360,838.98
  4. Step 4: Simplify right side
    666,762.55x = 332,020,665,072.05
  5. Step 5: Solve for x
    x = 332,020,665,072.05/666,762.55
  6. Step 6: Final answer
    x = 497,959.38

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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.