Home / 390,735.20-584,547.60-338,722.40

Finding the Fourth Proportional to 390,735.20, 584,547.60 and 338,722.40

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Solution

The fourth proportional to 390,735.20, 584,547.60 and 338,722.40 is: 506,735.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,735.20 : 584,547.60 = 338,722.40 : x
  2. Step 2: Convert to fraction form
    390,735.20/584,547.60 = 338,722.40/x
  3. Step 3: Cross multiply
    390,735.20x = 584,547.60 × 338,722.40
  4. Step 4: Simplify right side
    390,735.20x = 197,999,365,986.24
  5. Step 5: Solve for x
    x = 197,999,365,986.24/390,735.20
  6. Step 6: Final answer
    x = 506,735.42

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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.