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Finding the Fourth Proportional to 293,012.40, 439,810.20 and 143,421.60

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Solution

The fourth proportional to 293,012.40, 439,810.20 and 143,421.60 is: 215,275.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,012.40 : 439,810.20 = 143,421.60 : x
  2. Step 2: Convert to fraction form
    293,012.40/439,810.20 = 143,421.60/x
  3. Step 3: Cross multiply
    293,012.40x = 439,810.20 × 143,421.60
  4. Step 4: Simplify right side
    293,012.40x = 63,078,282,580.32
  5. Step 5: Solve for x
    x = 63,078,282,580.32/293,012.40
  6. Step 6: Final answer
    x = 215,275.13

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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.