Home / 670,590.72-1,005,575.04-390,188.16

Finding the Fourth Proportional to 670,590.72, 1,005,575.04 and 390,188.16

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Solution

The fourth proportional to 670,590.72, 1,005,575.04 and 390,188.16 is: 585,101.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,590.72 : 1,005,575.04 = 390,188.16 : x
  2. Step 2: Convert to fraction form
    670,590.72/1,005,575.04 = 390,188.16/x
  3. Step 3: Cross multiply
    670,590.72x = 1,005,575.04 × 390,188.16
  4. Step 4: Simplify right side
    670,590.72x = 392,363,474,599.53
  5. Step 5: Solve for x
    x = 392,363,474,599.53/670,590.72
  6. Step 6: Final answer
    x = 585,101.26

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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.