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Finding the Fourth Proportional to 559,397.86, 771,988.89 and 317,673.70

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Solution

The fourth proportional to 559,397.86, 771,988.89 and 317,673.70 is: 438,400.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,397.86 : 771,988.89 = 317,673.70 : x
  2. Step 2: Convert to fraction form
    559,397.86/771,988.89 = 317,673.70/x
  3. Step 3: Cross multiply
    559,397.86x = 771,988.89 × 317,673.70
  4. Step 4: Simplify right side
    559,397.86x = 245,240,567,045.19
  5. Step 5: Solve for x
    x = 245,240,567,045.19/559,397.86
  6. Step 6: Final answer
    x = 438,400.97

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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.