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Finding the Fourth Proportional to 891,426, 1,230,187.32 and 489,018

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Solution

The fourth proportional to 891,426, 1,230,187.32 and 489,018 is: 674,855.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,426 : 1,230,187.32 = 489,018 : x
  2. Step 2: Convert to fraction form
    891,426/1,230,187.32 = 489,018/x
  3. Step 3: Cross multiply
    891,426x = 1,230,187.32 × 489,018
  4. Step 4: Simplify right side
    891,426x = 601,583,742,851.76
  5. Step 5: Solve for x
    x = 601,583,742,851.76/891,426
  6. Step 6: Final answer
    x = 674,855.50

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1.5x scale

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.