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Finding the Fourth Proportional to 717,321.84, 989,858.52 and 430,854

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Solution

The fourth proportional to 717,321.84, 989,858.52 and 430,854 is: 594,551.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,321.84 : 989,858.52 = 430,854 : x
  2. Step 2: Convert to fraction form
    717,321.84/989,858.52 = 430,854/x
  3. Step 3: Cross multiply
    717,321.84x = 989,858.52 × 430,854
  4. Step 4: Simplify right side
    717,321.84x = 426,484,502,776.08
  5. Step 5: Solve for x
    x = 426,484,502,776.08/717,321.84
  6. Step 6: Final answer
    x = 594,551.12

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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.