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Finding the Fourth Proportional to 620,564.70, 931,721.85 and 384,368.70

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Solution

The fourth proportional to 620,564.70, 931,721.85 and 384,368.70 is: 577,094.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,564.70 : 931,721.85 = 384,368.70 : x
  2. Step 2: Convert to fraction form
    620,564.70/931,721.85 = 384,368.70/x
  3. Step 3: Cross multiply
    620,564.70x = 931,721.85 × 384,368.70
  4. Step 4: Simplify right side
    620,564.70x = 358,124,716,246.10
  5. Step 5: Solve for x
    x = 358,124,716,246.10/620,564.70
  6. Step 6: Final answer
    x = 577,094.89

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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.