Home / 1,315,730.07-1,815,128.87-771,589.89

Finding the Fourth Proportional to 1,315,730.07, 1,815,128.87 and 771,589.89

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Solution

The fourth proportional to 1,315,730.07, 1,815,128.87 and 771,589.89 is: 1,064,454.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,730.07 : 1,815,128.87 = 771,589.89 : x
  2. Step 2: Convert to fraction form
    1,315,730.07/1,815,128.87 = 771,589.89/x
  3. Step 3: Cross multiply
    1,315,730.07x = 1,815,128.87 × 771,589.89
  4. Step 4: Simplify right side
    1,315,730.07x = 1,400,535,081,281.17
  5. Step 5: Solve for x
    x = 1,400,535,081,281.17/1,315,730.07
  6. Step 6: Final answer
    x = 1,064,454.72

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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.