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Finding the Fourth Proportional to 717,326.84, 989,865.42 and 430,859

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Solution

The fourth proportional to 717,326.84, 989,865.42 and 430,859 is: 594,558.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,326.84 : 989,865.42 = 430,859 : x
  2. Step 2: Convert to fraction form
    717,326.84/989,865.42 = 430,859/x
  3. Step 3: Cross multiply
    717,326.84x = 989,865.42 × 430,859
  4. Step 4: Simplify right side
    717,326.84x = 426,492,424,995.78
  5. Step 5: Solve for x
    x = 426,492,424,995.78/717,326.84
  6. Step 6: Final answer
    x = 594,558.02

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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.