Home / 905,489.35-1,249,302.80-542,780.87

Finding the Fourth Proportional to 905,489.35, 1,249,302.80 and 542,780.87

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Solution

The fourth proportional to 905,489.35, 1,249,302.80 and 542,780.87 is: 748,874.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,489.35 : 1,249,302.80 = 542,780.87 : x
  2. Step 2: Convert to fraction form
    905,489.35/1,249,302.80 = 542,780.87/x
  3. Step 3: Cross multiply
    905,489.35x = 1,249,302.80 × 542,780.87
  4. Step 4: Simplify right side
    905,489.35x = 678,097,655,787.87
  5. Step 5: Solve for x
    x = 678,097,655,787.87/905,489.35
  6. Step 6: Final answer
    x = 748,874.25

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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.