Home / 646,916.40-970,720.20-291,985.20

Finding the Fourth Proportional to 646,916.40, 970,720.20 and 291,985.20

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Solution

The fourth proportional to 646,916.40, 970,720.20 and 291,985.20 is: 438,133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,916.40 : 970,720.20 = 291,985.20 : x
  2. Step 2: Convert to fraction form
    646,916.40/970,720.20 = 291,985.20/x
  3. Step 3: Cross multiply
    646,916.40x = 970,720.20 × 291,985.20
  4. Step 4: Simplify right side
    646,916.40x = 283,435,931,741.04
  5. Step 5: Solve for x
    x = 283,435,931,741.04/646,916.40
  6. Step 6: Final answer
    x = 438,133.79

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1.5x scale

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.