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Finding the Fourth Proportional to 528,389.48, 729,181.62 and 310,539.67

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Solution

The fourth proportional to 528,389.48, 729,181.62 and 310,539.67 is: 428,547.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,389.48 : 729,181.62 = 310,539.67 : x
  2. Step 2: Convert to fraction form
    528,389.48/729,181.62 = 310,539.67/x
  3. Step 3: Cross multiply
    528,389.48x = 729,181.62 × 310,539.67
  4. Step 4: Simplify right side
    528,389.48x = 226,439,817,821.91
  5. Step 5: Solve for x
    x = 226,439,817,821.91/528,389.48
  6. Step 6: Final answer
    x = 428,547.17

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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.