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Finding the Fourth Proportional to 993,985.70, 1,490,978.55 and 836,521.70

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Solution

The fourth proportional to 993,985.70, 1,490,978.55 and 836,521.70 is: 1,254,782.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,985.70 : 1,490,978.55 = 836,521.70 : x
  2. Step 2: Convert to fraction form
    993,985.70/1,490,978.55 = 836,521.70/x
  3. Step 3: Cross multiply
    993,985.70x = 1,490,978.55 × 836,521.70
  4. Step 4: Simplify right side
    993,985.70x = 1,247,235,911,309.53
  5. Step 5: Solve for x
    x = 1,247,235,911,309.53/993,985.70
  6. Step 6: Final answer
    x = 1,254,782.55

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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.