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Finding the Fourth Proportional to 453,547.20, 680,320.80 and 390,561.60

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Solution

The fourth proportional to 453,547.20, 680,320.80 and 390,561.60 is: 585,842.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,547.20 : 680,320.80 = 390,561.60 : x
  2. Step 2: Convert to fraction form
    453,547.20/680,320.80 = 390,561.60/x
  3. Step 3: Cross multiply
    453,547.20x = 680,320.80 × 390,561.60
  4. Step 4: Simplify right side
    453,547.20x = 265,707,180,161.28
  5. Step 5: Solve for x
    x = 265,707,180,161.28/453,547.20
  6. Step 6: Final answer
    x = 585,842.40

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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.