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Finding the Fourth Proportional to 434,428.60, 651,642.90 and 402,935.80

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Solution

The fourth proportional to 434,428.60, 651,642.90 and 402,935.80 is: 604,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,428.60 : 651,642.90 = 402,935.80 : x
  2. Step 2: Convert to fraction form
    434,428.60/651,642.90 = 402,935.80/x
  3. Step 3: Cross multiply
    434,428.60x = 651,642.90 × 402,935.80
  4. Step 4: Simplify right side
    434,428.60x = 262,570,253,225.82
  5. Step 5: Solve for x
    x = 262,570,253,225.82/434,428.60
  6. Step 6: Final answer
    x = 604,403.70

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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.