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Finding the Fourth Proportional to 708,009.74, 976,607.07 and 421,315.82

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Solution

The fourth proportional to 708,009.74, 976,607.07 and 421,315.82 is: 581,150.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,009.74 : 976,607.07 = 421,315.82 : x
  2. Step 2: Convert to fraction form
    708,009.74/976,607.07 = 421,315.82/x
  3. Step 3: Cross multiply
    708,009.74x = 976,607.07 × 421,315.82
  4. Step 4: Simplify right side
    708,009.74x = 411,460,008,514.85
  5. Step 5: Solve for x
    x = 411,460,008,514.85/708,009.74
  6. Step 6: Final answer
    x = 581,150.21

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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.