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Finding the Fourth Proportional to 401,898.80, 602,848.20 and 307,420.40

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Solution

The fourth proportional to 401,898.80, 602,848.20 and 307,420.40 is: 461,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,898.80 : 602,848.20 = 307,420.40 : x
  2. Step 2: Convert to fraction form
    401,898.80/602,848.20 = 307,420.40/x
  3. Step 3: Cross multiply
    401,898.80x = 602,848.20 × 307,420.40
  4. Step 4: Simplify right side
    401,898.80x = 185,327,834,783.28
  5. Step 5: Solve for x
    x = 185,327,834,783.28/401,898.80
  6. Step 6: Final answer
    x = 461,130.60

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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.