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Finding the Fourth Proportional to 858,894.70, 1,288,342.05 and 540,030.10

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Solution

The fourth proportional to 858,894.70, 1,288,342.05 and 540,030.10 is: 810,045.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,894.70 : 1,288,342.05 = 540,030.10 : x
  2. Step 2: Convert to fraction form
    858,894.70/1,288,342.05 = 540,030.10/x
  3. Step 3: Cross multiply
    858,894.70x = 1,288,342.05 × 540,030.10
  4. Step 4: Simplify right side
    858,894.70x = 695,743,486,095.71
  5. Step 5: Solve for x
    x = 695,743,486,095.71/858,894.70
  6. Step 6: Final answer
    x = 810,045.15

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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.