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Finding the Fourth Proportional to 1,500.45, 2,070.51 and 870.87

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Solution

The fourth proportional to 1,500.45, 2,070.51 and 870.87 is: 1,201.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,500.45 : 2,070.51 = 870.87 : x
  2. Step 2: Convert to fraction form
    1,500.45/2,070.51 = 870.87/x
  3. Step 3: Cross multiply
    1,500.45x = 2,070.51 × 870.87
  4. Step 4: Simplify right side
    1,500.45x = 1,803,153.07
  5. Step 5: Solve for x
    x = 1,803,153.07/1,500.45
  6. Step 6: Final answer
    x = 1,201.74

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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.