Home / 645,916.05-891,331.01-493,061.15

Finding the Fourth Proportional to 645,916.05, 891,331.01 and 493,061.15

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Solution

The fourth proportional to 645,916.05, 891,331.01 and 493,061.15 is: 680,399.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,916.05 : 891,331.01 = 493,061.15 : x
  2. Step 2: Convert to fraction form
    645,916.05/891,331.01 = 493,061.15/x
  3. Step 3: Cross multiply
    645,916.05x = 891,331.01 × 493,061.15
  4. Step 4: Simplify right side
    645,916.05x = 439,480,692,821.26
  5. Step 5: Solve for x
    x = 439,480,692,821.26/645,916.05
  6. Step 6: Final answer
    x = 680,399.09

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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.