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Finding the Fourth Proportional to 489,018.90, 732,544.20 and 339,428.10

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Solution

The fourth proportional to 489,018.90, 732,544.20 and 339,428.10 is: 508,459.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,018.90 : 732,544.20 = 339,428.10 : x
  2. Step 2: Convert to fraction form
    489,018.90/732,544.20 = 339,428.10/x
  3. Step 3: Cross multiply
    489,018.90x = 732,544.20 × 339,428.10
  4. Step 4: Simplify right side
    489,018.90x = 248,646,085,972.02
  5. Step 5: Solve for x
    x = 248,646,085,972.02/489,018.90
  6. Step 6: Final answer
    x = 508,459.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.