Home / 858,875.10-1,288,312.65-780,143.10

Finding the Fourth Proportional to 858,875.10, 1,288,312.65 and 780,143.10

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Solution

The fourth proportional to 858,875.10, 1,288,312.65 and 780,143.10 is: 1,170,214.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,875.10 : 1,288,312.65 = 780,143.10 : x
  2. Step 2: Convert to fraction form
    858,875.10/1,288,312.65 = 780,143.10/x
  3. Step 3: Cross multiply
    858,875.10x = 1,288,312.65 × 780,143.10
  4. Step 4: Simplify right side
    858,875.10x = 1,005,068,224,540.21
  5. Step 5: Solve for x
    x = 1,005,068,224,540.21/858,875.10
  6. Step 6: Final answer
    x = 1,170,214.65

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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.