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Finding the Fourth Proportional to 285,420.30, 428,130.45 and 174,828.30

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Solution

The fourth proportional to 285,420.30, 428,130.45 and 174,828.30 is: 262,242.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,420.30 : 428,130.45 = 174,828.30 : x
  2. Step 2: Convert to fraction form
    285,420.30/428,130.45 = 174,828.30/x
  3. Step 3: Cross multiply
    285,420.30x = 428,130.45 × 174,828.30
  4. Step 4: Simplify right side
    285,420.30x = 74,849,318,751.74
  5. Step 5: Solve for x
    x = 74,849,318,751.74/285,420.30
  6. Step 6: Final answer
    x = 262,242.45

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1.5x scale

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.