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Finding the Fourth Proportional to 553,325.40, 830,376.90 and 354,130.20

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Solution

The fourth proportional to 553,325.40, 830,376.90 and 354,130.20 is: 531,444.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,325.40 : 830,376.90 = 354,130.20 : x
  2. Step 2: Convert to fraction form
    553,325.40/830,376.90 = 354,130.20/x
  3. Step 3: Cross multiply
    553,325.40x = 830,376.90 × 354,130.20
  4. Step 4: Simplify right side
    553,325.40x = 294,061,537,672.38
  5. Step 5: Solve for x
    x = 294,061,537,672.38/553,325.40
  6. Step 6: Final answer
    x = 531,444.13

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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.