Home / 689,359.60-1,034,881.80-390,048.40

Finding the Fourth Proportional to 689,359.60, 1,034,881.80 and 390,048.40

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Solution

The fourth proportional to 689,359.60, 1,034,881.80 and 390,048.40 is: 585,549.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,359.60 : 1,034,881.80 = 390,048.40 : x
  2. Step 2: Convert to fraction form
    689,359.60/1,034,881.80 = 390,048.40/x
  3. Step 3: Cross multiply
    689,359.60x = 1,034,881.80 × 390,048.40
  4. Step 4: Simplify right side
    689,359.60x = 403,653,990,279.12
  5. Step 5: Solve for x
    x = 403,653,990,279.12/689,359.60
  6. Step 6: Final answer
    x = 585,549.24

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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.