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Finding the Fourth Proportional to 1,319,966.98, 1,821,290.95 and 803,374.85

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Solution

The fourth proportional to 1,319,966.98, 1,821,290.95 and 803,374.85 is: 1,108,496.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,966.98 : 1,821,290.95 = 803,374.85 : x
  2. Step 2: Convert to fraction form
    1,319,966.98/1,821,290.95 = 803,374.85/x
  3. Step 3: Cross multiply
    1,319,966.98x = 1,821,290.95 × 803,374.85
  4. Step 4: Simplify right side
    1,319,966.98x = 1,463,179,343,762.61
  5. Step 5: Solve for x
    x = 1,463,179,343,762.61/1,319,966.98
  6. Step 6: Final answer
    x = 1,108,496.93

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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.