Home / 689,358.60-1,034,880.30-390,047.40

Finding the Fourth Proportional to 689,358.60, 1,034,880.30 and 390,047.40

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Solution

The fourth proportional to 689,358.60, 1,034,880.30 and 390,047.40 is: 585,547.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,358.60 : 1,034,880.30 = 390,047.40 : x
  2. Step 2: Convert to fraction form
    689,358.60/1,034,880.30 = 390,047.40/x
  3. Step 3: Cross multiply
    689,358.60x = 1,034,880.30 × 390,047.40
  4. Step 4: Simplify right side
    689,358.60x = 403,652,370,326.22
  5. Step 5: Solve for x
    x = 403,652,370,326.22/689,358.60
  6. Step 6: Final answer
    x = 585,547.74

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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.