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Finding the Fourth Proportional to 620,393.54, 931,387.23 and 478,329.08

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Solution

The fourth proportional to 620,393.54, 931,387.23 and 478,329.08 is: 718,108.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,393.54 : 931,387.23 = 478,329.08 : x
  2. Step 2: Convert to fraction form
    620,393.54/931,387.23 = 478,329.08/x
  3. Step 3: Cross multiply
    620,393.54x = 931,387.23 × 478,329.08
  4. Step 4: Simplify right side
    620,393.54x = 445,509,592,192.71
  5. Step 5: Solve for x
    x = 445,509,592,192.71/620,393.54
  6. Step 6: Final answer
    x = 718,108.05

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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.