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Finding the Fourth Proportional to 390,590.79, 585,886.18 and 370,645.35

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Solution

The fourth proportional to 390,590.79, 585,886.18 and 370,645.35 is: 555,968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,590.79 : 585,886.18 = 370,645.35 : x
  2. Step 2: Convert to fraction form
    390,590.79/585,886.18 = 370,645.35/x
  3. Step 3: Cross multiply
    390,590.79x = 585,886.18 × 370,645.35
  4. Step 4: Simplify right side
    390,590.79x = 217,155,988,246.26
  5. Step 5: Solve for x
    x = 217,155,988,246.26/390,590.79
  6. Step 6: Final answer
    x = 555,968.02

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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.