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Finding the Fourth Proportional to 707,624.60, 976,369.61 and 421,088.72

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Solution

The fourth proportional to 707,624.60, 976,369.61 and 421,088.72 is: 581,011.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,624.60 : 976,369.61 = 421,088.72 : x
  2. Step 2: Convert to fraction form
    707,624.60/976,369.61 = 421,088.72/x
  3. Step 3: Cross multiply
    707,624.60x = 976,369.61 × 421,088.72
  4. Step 4: Simplify right side
    707,624.60x = 411,138,225,492.67
  5. Step 5: Solve for x
    x = 411,138,225,492.67/707,624.60
  6. Step 6: Final answer
    x = 581,011.78

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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.