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Finding the Fourth Proportional to 554,636.76, 765,398.88 and 312,970.56

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Solution

The fourth proportional to 554,636.76, 765,398.88 and 312,970.56 is: 431,899.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,636.76 : 765,398.88 = 312,970.56 : x
  2. Step 2: Convert to fraction form
    554,636.76/765,398.88 = 312,970.56/x
  3. Step 3: Cross multiply
    554,636.76x = 765,398.88 × 312,970.56
  4. Step 4: Simplify right side
    554,636.76x = 239,547,316,096.97
  5. Step 5: Solve for x
    x = 239,547,316,096.97/554,636.76
  6. Step 6: Final answer
    x = 431,899.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.