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Finding the Fourth Proportional to 989,712, 1,365,809.85 and 537,003

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Solution

The fourth proportional to 989,712, 1,365,809.85 and 537,003 is: 741,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,712 : 1,365,809.85 = 537,003 : x
  2. Step 2: Convert to fraction form
    989,712/1,365,809.85 = 537,003/x
  3. Step 3: Cross multiply
    989,712x = 1,365,809.85 × 537,003
  4. Step 4: Simplify right side
    989,712x = 733,443,986,879.55
  5. Step 5: Solve for x
    x = 733,443,986,879.55/989,712
  6. Step 6: Final answer
    x = 741,068.10

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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.