Home / 1,128,913.12-1,557,898.08-645,487.36

Finding the Fourth Proportional to 1,128,913.12, 1,557,898.08 and 645,487.36

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Solution

The fourth proportional to 1,128,913.12, 1,557,898.08 and 645,487.36 is: 890,771.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,913.12 : 1,557,898.08 = 645,487.36 : x
  2. Step 2: Convert to fraction form
    1,128,913.12/1,557,898.08 = 645,487.36/x
  3. Step 3: Cross multiply
    1,128,913.12x = 1,557,898.08 × 645,487.36
  4. Step 4: Simplify right side
    1,128,913.12x = 1,005,603,518,808.27
  5. Step 5: Solve for x
    x = 1,005,603,518,808.27/1,128,913.12
  6. Step 6: Final answer
    x = 890,771.40

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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.