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Finding the Fourth Proportional to 426,390.40, 639,585.60 and 249,097.60

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Solution

The fourth proportional to 426,390.40, 639,585.60 and 249,097.60 is: 373,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,390.40 : 639,585.60 = 249,097.60 : x
  2. Step 2: Convert to fraction form
    426,390.40/639,585.60 = 249,097.60/x
  3. Step 3: Cross multiply
    426,390.40x = 639,585.60 × 249,097.60
  4. Step 4: Simplify right side
    426,390.40x = 159,319,237,954.56
  5. Step 5: Solve for x
    x = 159,319,237,954.56/426,390.40
  6. Step 6: Final answer
    x = 373,646.40

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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.