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Finding the Fourth Proportional to 357,048.72, 492,278.85 and 261,389.34

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Solution

The fourth proportional to 357,048.72, 492,278.85 and 261,389.34 is: 360,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,048.72 : 492,278.85 = 261,389.34 : x
  2. Step 2: Convert to fraction form
    357,048.72/492,278.85 = 261,389.34/x
  3. Step 3: Cross multiply
    357,048.72x = 492,278.85 × 261,389.34
  4. Step 4: Simplify right side
    357,048.72x = 128,676,443,697.46
  5. Step 5: Solve for x
    x = 128,676,443,697.46/357,048.72
  6. Step 6: Final answer
    x = 360,389.04

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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.