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Finding the Fourth Proportional to 438,030.36, 658,152.72 and 420,315.72

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Solution

The fourth proportional to 438,030.36, 658,152.72 and 420,315.72 is: 631,535.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,030.36 : 658,152.72 = 420,315.72 : x
  2. Step 2: Convert to fraction form
    438,030.36/658,152.72 = 420,315.72/x
  3. Step 3: Cross multiply
    438,030.36x = 658,152.72 × 420,315.72
  4. Step 4: Simplify right side
    438,030.36x = 276,631,934,376.76
  5. Step 5: Solve for x
    x = 276,631,934,376.76/438,030.36
  6. Step 6: Final answer
    x = 631,535.98

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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.