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Finding the Fourth Proportional to 559,783.98, 772,472.72 and 318,033

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Solution

The fourth proportional to 559,783.98, 772,472.72 and 318,033 is: 438,868.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,783.98 : 772,472.72 = 318,033 : x
  2. Step 2: Convert to fraction form
    559,783.98/772,472.72 = 318,033/x
  3. Step 3: Cross multiply
    559,783.98x = 772,472.72 × 318,033
  4. Step 4: Simplify right side
    559,783.98x = 245,671,817,354.84
  5. Step 5: Solve for x
    x = 245,671,817,354.84/559,783.98
  6. Step 6: Final answer
    x = 438,868.97

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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.