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Finding the Fourth Proportional to 571,478.15, 788,675.21 and 316,829.34

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Solution

The fourth proportional to 571,478.15, 788,675.21 and 316,829.34 is: 437,244.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,478.15 : 788,675.21 = 316,829.34 : x
  2. Step 2: Convert to fraction form
    571,478.15/788,675.21 = 316,829.34/x
  3. Step 3: Cross multiply
    571,478.15x = 788,675.21 × 316,829.34
  4. Step 4: Simplify right side
    571,478.15x = 249,875,447,644.79
  5. Step 5: Solve for x
    x = 249,875,447,644.79/571,478.15
  6. Step 6: Final answer
    x = 437,244.10

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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.