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Finding the Fourth Proportional to 571,015.68, 787,968.72 and 316,351.68

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Solution

The fourth proportional to 571,015.68, 787,968.72 and 316,351.68 is: 436,547.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,015.68 : 787,968.72 = 316,351.68 : x
  2. Step 2: Convert to fraction form
    571,015.68/787,968.72 = 316,351.68/x
  3. Step 3: Cross multiply
    571,015.68x = 787,968.72 × 316,351.68
  4. Step 4: Simplify right side
    571,015.68x = 249,275,228,359.45
  5. Step 5: Solve for x
    x = 249,275,228,359.45/571,015.68
  6. Step 6: Final answer
    x = 436,547.08

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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.