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Finding the Fourth Proportional to 999.95, 1,498.10 and 870.35

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Solution

The fourth proportional to 999.95, 1,498.10 and 870.35 is: 1,303.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.95 : 1,498.10 = 870.35 : x
  2. Step 2: Convert to fraction form
    999.95/1,498.10 = 870.35/x
  3. Step 3: Cross multiply
    999.95x = 1,498.10 × 870.35
  4. Step 4: Simplify right side
    999.95x = 1,303,871.34
  5. Step 5: Solve for x
    x = 1,303,871.34/999.95
  6. Step 6: Final answer
    x = 1,303.94

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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.